App Install

Measure app installation speed. This scenario has two roles:

  • minimal: Installs a simple app which implements initialisation callbacks but otherwise doesn't contain a lot of code.
  • large: Installs a larger app that contains some dependencies and some generated data as padding to make the bundle larger.

These are intended to catch a compilation slowdown or issues with copying around large WASMs (e.g. accidental cloning or tracing). In each case, the behaviour will uninstall the app it installed so that it can re-install it on the next iteration.

Started
Thu, 19 Mar 2026 09:10:31 UTC
Peer count
1
Peer count at end
1
Behaviours
  • minimal (1 agent)
Holochain version
0.6.1-rc.3
Wind Tunnel version
0.6.0
Run ID
app_install_minimal_23286930829
First install time
The time from conductor startup to completion of the first app installation attempt.
0.312038814s
Install app timing
The time taken to install an app.
mean 0.040438s (SD = 0.005377s) p50 0.039338s p95 0.048458s p99 0.057812s
Host Metrics
User CPU usage
CPU usage by user space
13.75%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 4.62 KiB/s < mean 29.91 KiB/s (SD = 49.40 KiB/s) < p95165.86 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 604 B/s < mean 12.45 KiB/s (SD = 17.65 KiB/s) < p9544.97 KiB/s
Total bytes received
Total bytes received on primary network interface
count
2.92 MiB
mean
29.91 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
1.22 MiB
mean
12.45 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 1064.07 MB/s

Disk full anomaly
Disk full anomaly was detected
NotDetected
Swap thrashing anomaly
Swap thrashing anomaly was detected
Detected

Critical Heavy swap usage (26.1% swap used)

System overload anomaly
System overload anomaly was detected
NotDetected
Additional Host Metrics
Hidden by default. Click to toggle visibility.
CPU usage
Total CPU usage and kernel CPU usage
Total
p5 12.03% < mean 21.28% (SD = 4.65%) < p95 25.93%
System
7.52%
CPU percentiles
CPU usage percentiles
p50
23.91%
p95
25.93%
p99
25.93%
CPU usage above 80%
Number of hosts above 80% CPU and mean time spent above threshold for those hosts
count
0 hosts
mean time
0.00s
Memory used percentage
Percentage of memory used
p5 24.76% < mean 38.99% (SD = 9.05%) < p95 52.2%
Memory available percentage
Percentage of available memory
p5 47.8% < mean 61.01% (SD = 9.05%) < p95 75.24%
Max host memory used
Maximum memory usage percentage across all hosts
max 38.99%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 26.05%
Memory growth rate
Rate of memory growth over time
growth 1064.07MB/s
Disk read throughput
Disk read throughput in MB/s
2.38MB/s
Disk write throughput
Disk write throughput in MB/s
85.44MB/s
Disk space utilization risk
Number of hosts nearing disk space capacity by mount point
Mount Point /etc/hostname
0/1hosts
Mount Point /etc/hosts
0/1hosts
Mount Point /etc/resolv.conf
0/1hosts
System load average
System load averages over 1, 5, and 15 minutes. This is an unnormalised value not divided by number of CPUs, so it is only meaningful if all machines have the same core count.
1 min
1.16
5 min
0.54
15 min
0.37
CPU overloaded hosts
Percentage of hosts that experienced CPU overload
0.00%
CPU pressure
CPU pressure over 10, 60, and 300 second averages
10 second average
p5 0% < mean 0.1064% (SD = 0.1438%) < p95 0.51%
60 second average
0.0745%
300 second average
0.0164%
Memory pressure some
Memory pressure (some tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% < mean 0.2182% (SD = 0.3277%) < p95 0.85%
60 second average
0.0745%
300 second average
0.0164%
Memory pressure full
Memory pressure (all tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% < mean 0.2182% (SD = 0.3277%) < p95 0.85%
60 second average
0.0745%
300 second average
0.0164%
I/O pressure some
I/O pressure (some tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 0.1982% (SD = 0.2706%) < p95 0.87%
60 second average
0.0909%
300 second average
0.0227%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 0.1982% (SD = 0.2706%) < p95 0.87%
60 second average
0.0909%
300 second average
0.0227%
Holochain process CPU usage
CPU usage by Holochain process
p5 0% < mean 12.29% (SD = 4.48%) < p95 17.96%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 422.04 KiB < mean 1.14 MiB (SD = 624.42 KiB) < p952.02 MiB
Holochain process threads
Number of threads in Holochain process
p5 1 threads < mean 19.18 threads (SD = 5.75 threads) < p95 21 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 0 file descriptors < mean 839.36 file descriptors (SD = 346.41 file descriptors) < p95 1024 file descriptors

App Install

Measure app installation speed. This scenario has two roles:

  • minimal: Installs a simple app which implements initialisation callbacks but otherwise doesn't contain a lot of code.
  • large: Installs a larger app that contains some dependencies and some generated data as padding to make the bundle larger.

These are intended to catch a compilation slowdown or issues with copying around large WASMs (e.g. accidental cloning or tracing). In each case, the behaviour will uninstall the app it installed so that it can re-install it on the next iteration.

Started
Thu, 19 Mar 2026 09:08:27 UTC
Peer count
1
Peer count at end
1
Behaviours
  • large (1 agent)
Holochain version
0.6.1-rc.3
Wind Tunnel version
0.6.0
Run ID
app_install_large_23286930829
First install time
The time from conductor startup to completion of the first app installation attempt.
0.977485213s
Install app timing
The time taken to install an app.
mean 0.26466s (SD = 0.137096s) p50 0.231137s p95 0.467308s p99 0.753141s
Host Metrics
User CPU usage
CPU usage by user space
16.93%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 11.14 KiB/s < mean 325.77 KiB/s (SD = 716.23 KiB/s) < p952.45 MiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 6.90 KiB/s < mean 16.74 KiB/s (SD = 10.25 KiB/s) < p9547.25 KiB/s
Total bytes received
Total bytes received on primary network interface
count
35.00 MiB
mean
325.77 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
1.80 MiB
mean
16.74 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 1318.07 MB/s

Disk full anomaly
Disk full anomaly was detected
NotDetected
Swap thrashing anomaly
Swap thrashing anomaly was detected
Detected

Warning Moderate swap usage (14.1% swap used)

System overload anomaly
System overload anomaly was detected
NotDetected
Additional Host Metrics
Hidden by default. Click to toggle visibility.
CPU usage
Total CPU usage and kernel CPU usage
Total
p5 1.81% < mean 20.73% (SD = 13.64%) < p95 57.65%
System
3.79%
CPU percentiles
CPU usage percentiles
p50
17.02%
p95
57.65%
p99
57.65%
CPU usage above 80%
Number of hosts above 80% CPU and mean time spent above threshold for those hosts
count
0 hosts
mean time
0.00s
Memory used percentage
Percentage of memory used
p5 42.14% < mean 50.27% (SD = 4.89%) < p95 57.34%
Memory available percentage
Percentage of available memory
p5 42.66% < mean 49.73% (SD = 4.89%) < p95 57.86%
Max host memory used
Maximum memory usage percentage across all hosts
max 50.27%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 14.10%
Memory growth rate
Rate of memory growth over time
growth 1318.07MB/s
Disk read throughput
Disk read throughput in MB/s
0.01MB/s
Disk write throughput
Disk write throughput in MB/s
5.75MB/s
Disk space utilization risk
Number of hosts nearing disk space capacity by mount point
Mount Point /etc/hostname
0/1hosts
Mount Point /etc/hosts
0/1hosts
Mount Point /etc/resolv.conf
0/1hosts
System load average
System load averages over 1, 5, and 15 minutes. This is an unnormalised value not divided by number of CPUs, so it is only meaningful if all machines have the same core count.
1 min
0.78
5 min
0.30
15 min
0.11
CPU overloaded hosts
Percentage of hosts that experienced CPU overload
0.00%
CPU pressure
CPU pressure over 10, 60, and 300 second averages
10 second average
p5 0% < mean 0.8067% (SD = 0.4559%) < p95 1.38%
60 second average
0.5233%
300 second average
0.1608%
Memory pressure some
Memory pressure (some tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
Memory pressure full
Memory pressure (all tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
I/O pressure some
I/O pressure (some tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 2.38% < mean 12.6525% (SD = 4.7821%) < p95 21.48%
60 second average
8.3975%
300 second average
3.5667%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 2.38% < mean 12.3725% (SD = 4.7099%) < p95 21.22%
60 second average
8.1908%
300 second average
3.4958%
Holochain process CPU usage
CPU usage by Holochain process
p5 0% < mean 15.91% (SD = 13.86%) < p95 55.43%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 182.09 KiB < mean 738.60 KiB (SD = 300.73 KiB) < p951.14 MiB
Holochain process threads
Number of threads in Holochain process
p5 1 threads < mean 16.67 threads (SD = 7.03 threads) < p95 20 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 0 file descriptors < mean 564.83 file descriptors (SD = 408.77 file descriptors) < p95 1024 file descriptors

First Call

This scenario installs a simple app which implements the init callback, and measures the time elapsed between start of install and calling init. It will uninstall the app it installed so that it can re-install it on the next iteration. This is required to re-run the initialisation callback.

Started
Thu, 19 Mar 2026 08:51:16 UTC
Peer count
1
Peer count at end
1
Behaviours
  • default (1 agent)
Holochain version
0.6.1-rc.3
Wind Tunnel version
0.6.0
Run ID
first_call_23286930829
Zome call timing
The time elapsed between start of install and calling init.
mean 0.01121s (SD = 0.006639s) p50 0.009374s p95 0.018639s p99 0.039349s
Host Metrics
User CPU usage
CPU usage by user space
14.58%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 83.45 KiB/s < mean 368.18 KiB/s (SD = 866.44 KiB/s) < p953.17 MiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 37.31 KiB/s < mean 44.61 KiB/s (SD = 16.33 KiB/s) < p9598.55 KiB/s
Total bytes received
Total bytes received on primary network interface
count
43.15 MiB
mean
368.18 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
5.23 MiB
mean
44.61 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 2109.22 MB/s

Disk full anomaly
Disk full anomaly was detected
NotDetected
Swap thrashing anomaly
Swap thrashing anomaly was detected
NotDetected
System overload anomaly
System overload anomaly was detected
NotDetected
Additional Host Metrics
Hidden by default. Click to toggle visibility.
CPU usage
Total CPU usage and kernel CPU usage
Total
p5 14.3% < mean 16.94% (SD = 2.75%) < p95 25.81%
System
2.36%
CPU percentiles
CPU usage percentiles
p50
16.26%
p95
25.81%
p99
25.81%
CPU usage above 80%
Number of hosts above 80% CPU and mean time spent above threshold for those hosts
count
0 hosts
mean time
0.00s
Memory used percentage
Percentage of memory used
p5 6.33% < mean 13.15% (SD = 3.83%) < p95 18.86%
Memory available percentage
Percentage of available memory
p5 81.14% < mean 86.85% (SD = 3.83%) < p95 93.67%
Max host memory used
Maximum memory usage percentage across all hosts
max 13.15%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 0.00%
Memory growth rate
Rate of memory growth over time
growth 2109.22MB/s
Disk read throughput
Disk read throughput in MB/s
0.05MB/s
Disk write throughput
Disk write throughput in MB/s
11.60MB/s
Disk space utilization risk
Number of hosts nearing disk space capacity by mount point
Mount Point /
0/1hosts
Mount Point /nix/store
0/1hosts
System load average
System load averages over 1, 5, and 15 minutes. This is an unnormalised value not divided by number of CPUs, so it is only meaningful if all machines have the same core count.
1 min
1.07
5 min
0.35
15 min
0.12
CPU overloaded hosts
Percentage of hosts that experienced CPU overload
0.00%
CPU pressure
CPU pressure over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
Memory pressure some
Memory pressure (some tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
Memory pressure full
Memory pressure (all tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
I/O pressure some
I/O pressure (some tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 0.3638% (SD = 0.2727%) < p95 0.77%
60 second average
0.2131%
300 second average
0.0608%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 0.3177% (SD = 0.2278%) < p95 0.67%
60 second average
0.1946%
300 second average
0.0562%
Holochain process CPU usage
CPU usage by Holochain process
p5 13.54% < mean 15.27% (SD = 0.64%) < p95 16.05%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 275.52 KiB < mean 1.16 MiB (SD = 541.35 KiB) < p951.95 MiB
Holochain process threads
Number of threads in Holochain process
p5 20 threads < mean 21.83 threads (SD = 0.55 threads) < p95 22 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 96 file descriptors < mean 1649.75 file descriptors (SD = 762.5 file descriptors) < p95 2331 file descriptors

Full-Arc Create (Validated) / Zero-Arc Read

A full-arc/zero-arc mixed scenario where full-arc nodes create data that gets validated and zero-arc nodes read the data. The scenario has two roles:

  • full: A full-arc conductor that creates entries with a timestamp field. Those entries get validated and then retrieved by zero-arc nodes.
  • zero: A zero-arc conductor that reads the entries created by the full-arc node(s) and records the time lag between when the entry had been created and when it was first discovered.
Started
Thu, 19 Mar 2026 12:31:57 UTC
Peer count
65
Peer count at end
4225
Behaviours
  • full (1 agent)
  • zero (1 agent)
Holochain version
0.6.1-rc.3
Wind Tunnel version
0.6.0
Run ID
full_arc_create_validated_zero_arc_read--high_zero_23286930829
Create rate
The number of timed entries created by the full-arc node(s) per second.
Mean
mean 43.57/s
Max
Highest per-partition mean rate
max 112.72/s
Min
Lowest per-partition mean rate
min 11.16/s
Fetch lag timing
For each entry, the time lag between when it was created by a full-arc node and when a zero-arc node fetched it from the network.
Mean
mean 266.792455s (SD = 204.104223s)
Max
Highest per-partition mean latency
max mean 1168.163621s
Min
Lowest per-partition mean latency
min mean 4.862223s
Fetch rate
The number of entries per second fetched by zero-arc nodes.
Mean
mean 214.6/s
Max
Highest per-partition mean rate
max 2863/s
Min
Lowest per-partition mean rate
min 0/s
Open connections
The number of currently open connections to other conductors.
full-arc
p5 46 < mean 53.9 (SD = 8.16) < p95 60
zero-arc
p5 0 < mean 19.52 (SD = 15.08) < p95 40
Retrieval errors
Errors encountered by zero-arc nodes when attempting to retrieve entries created by full-arc nodes.
Total
460
Agents affected
54 / 58
Mean per agent
Total count divided by number of partitions, rounded to nearest whole number
8
Max
Highest count in any single partition
14
Min
Lowest count in any single partition
0
Error count
The number of errors accumulated across all nodes.
464

Local Signals

This scenario is for testing the speed and reliability of local signals. It uses a zome with a function that will emit 10,000 signals. The scenario measures how long it takes to send the signals and how many have been received by the time the zome call ends.

Started
Thu, 19 Mar 2026 08:53:14 UTC
Peer count
1
Peer count at end
1
Behaviours
  • default (1 agent)
Holochain version
0.6.1-rc.3
Wind Tunnel version
0.6.0
Run ID
local_signals_23286930829
Send timing
The time taken to emit a batch of 10,000 signals.
mean 3.211208s (SD = 1.525028s) p50 3.379008s p95 5.238327s p99 5.238327s
Receive timing
The time taken to receive the completed batch, to the nearest 250ms.
mean 28.785826s (SD = 3.436945s) p50 30.000749s p95 30.001482s p99 30.001482s
Success ratio
The proportion of signals successfully received in a batch.
min 0.8766999840736389 < mean 0.9625 (SD = 0.0366) < max 0.997099995613098
Host Metrics
User CPU usage
CPU usage by user space
2.17%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 431 B/s < mean 867 B/s (SD = 602 B/s) < p951.42 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 31 B/s < mean 255 B/s (SD = 459 B/s) < p95446 B/s
Total bytes received
Total bytes received on primary network interface
count
245.40 KiB
mean
867 B/s
Total bytes sent
Total bytes sent on primary network interface
count
72.10 KiB
mean
255 B/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 97.78 MB/s

Disk full anomaly
Disk full anomaly was detected
NotDetected
Swap thrashing anomaly
Swap thrashing anomaly was detected
NotDetected
System overload anomaly
System overload anomaly was detected
NotDetected
Additional Host Metrics
Hidden by default. Click to toggle visibility.
CPU usage
Total CPU usage and kernel CPU usage
Total
p5 0.94% < mean 5.82% (SD = 7.94%) < p95 19.4%
System
3.65%
CPU percentiles
CPU usage percentiles
p50
1.37%
p95
19.40%
p99
36.36%
CPU usage above 80%
Number of hosts above 80% CPU and mean time spent above threshold for those hosts
count
0 hosts
mean time
0.00s
Memory used percentage
Percentage of memory used
p5 69.82% < mean 70.2% (SD = 0.4%) < p95 71.22%
Memory available percentage
Percentage of available memory
p5 28.78% < mean 29.8% (SD = 0.4%) < p95 30.18%
Max host memory used
Maximum memory usage percentage across all hosts
max 70.20%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 0.00%
Memory growth rate
Rate of memory growth over time
growth 97.78MB/s
Disk read throughput
Disk read throughput in MB/s
0.01MB/s
Disk write throughput
Disk write throughput in MB/s
1.26MB/s
Disk space utilization risk
Number of hosts nearing disk space capacity by mount point
Mount Point /etc/hostname
0/1hosts
Mount Point /etc/hosts
0/1hosts
Mount Point /etc/resolv.conf
0/1hosts
System load average
System load averages over 1, 5, and 15 minutes. This is an unnormalised value not divided by number of CPUs, so it is only meaningful if all machines have the same core count.
1 min
2.19
5 min
1.12
15 min
0.65
CPU overloaded hosts
Percentage of hosts that experienced CPU overload
0.00%
CPU pressure
CPU pressure over 10, 60, and 300 second averages
10 second average
p5 0.28% < mean 3.8247% (SD = 3.9305%) < p95 13.13%
60 second average
2.8883%
300 second average
1.2063%
Memory pressure some
Memory pressure (some tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
Memory pressure full
Memory pressure (all tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
I/O pressure some
I/O pressure (some tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 0.0473% (SD = 0.0739%) < p95 0.2%
60 second average
0.0433%
300 second average
0.0067%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 0.0377% (SD = 0.061%) < p95 0.18%
60 second average
0.0310%
300 second average
0.0017%
Holochain process CPU usage
CPU usage by Holochain process
p5 0.07% < mean 1.4% (SD = 6.14%) ≤ p95 0.64%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 239.64 KiB < mean 241.98 KiB (SD = 4.20 KiB) < p95242.37 KiB
Holochain process threads
Number of threads in Holochain process
p5 12 threads ≤ mean 11.83 threads (SD = 0.9 threads) < p95 12 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 46 file descriptors < mean 51.23 file descriptors (SD = 11.4 file descriptors) < p95 70 file descriptors

Mixed Arc get_agent_activity

A mixed-arc scenario that measures the DHT's ability to propagate agent activity and make it available via get_agent_activity calls. The scenario has three roles:

  • zero_write: A zero-arc conductor that creates entries on its source chain.
  • full_write: A full-arc conductor that creates entries on its source chain.
  • zero_read: A zero-arc conductor that picks a random writer and repeatedly calls get_agent_activity to observe new entries appearing on the writer's chain, measuring the lag between creation and discovery.
Started
Thu, 19 Mar 2026 12:48:18 UTC
Peer count
65
Peer count at end
4225
Behaviours
  • full_write (1 agent)
  • zero_read (1 agent)
  • zero_write (1 agent)
Holochain version
0.6.1-rc.3
Wind Tunnel version
0.6.0
Run ID
mixed_arc_get_agent_activity_23286930829
Entry created count
The total number of entries created by write agents over the run, partitioned by agent and behaviour.
Total
346309
Agents affected
43 / 43
Mean per agent
Total count divided by number of partitions, rounded to nearest whole number
8054
Max
Highest count in any single partition
30062
Min
Lowest count in any single partition
587
Observed chain advancement
The maximum highest-observed action sequence per write agent, aggregated across all reading agents. The reading dimension is collapsed by taking the maximum observed value for each write agent (any reader successfully tracking that point counts as propagation). Captures how far readers tracked writers’ chains during the run.
Mean max (across write agents)
Mean of the highest chain head value observed per write agent. Each write agent contributes its maximum — the value seen by any reader.
7122.63
Max
Highest chain head value observed for any single write agent.
9317
Write agents observed
8
Chain head delay timing
The time lag between when a writer creates a new entry and when a reader discovers it via get_agent_activity. This is measured per new action in the chain.
Mean
mean 0.001845s (SD = 0.027965s)
Max
Highest per-partition mean latency
max mean 0.006266s
Min
Lowest per-partition mean latency
min mean 0.000342s
Chain head delay rate
The rate at which readers detect new chain heads appearing on writers' chains.
Mean
mean 44.51/s
Max
Highest per-partition mean rate
max 62.06/s
Min
Lowest per-partition mean rate
min 18.81/s
get_agent_activity_full zome call timing
The time taken to complete the get_agent_activity_full zome call that queries a writer's chain.
Mean
mean 0.203537s (SD = 0.130997s)
Max
Highest per-partition mean latency
max mean 0.395116s
Min
Lowest per-partition mean latency
min mean 0.129821s
Retrieval errors
A running accumulation of errors encountered by read agents when calling get_agent_activity.
Total
5
Agents affected
5 / 17
Mean per agent
Total count divided by number of partitions, rounded to nearest whole number
0
Max
Highest count in any single partition
1
Min
Lowest count in any single partition
0
Open connections
The number of currently open connections to other conductors, partitioned by agent behaviour.
  • behaviour: full_write
p5 33 < mean 53.84 (SD = 12.36) < p95 61
  • behaviour: zero_read
p5 0 < mean 38.22 (SD = 14.06) < p95 55
  • behaviour: zero_write
p5 24 < mean 36.91 (SD = 8.74) < p95 54
Final error count
The total number of errors accumulated across all agents over the run.
6
Host Metrics
User CPU usage
CPU usage by user space
26.97%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 7.31 KiB/s < mean 588.73 KiB/s (SD = 588.76 KiB/s) < p951.62 MiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 7.04 KiB/s < mean 551.27 KiB/s (SD = 698.76 KiB/s) < p951.96 MiB/s
Total bytes received
Total bytes received on primary network interface
count
32.45 GiB
mean
33.23 MiB/s
Total bytes sent
Total bytes sent on primary network interface
count
30.03 GiB
mean
30.75 MiB/s
CPU spike anomaly
CPU spike anomaly was detected
Detected

Warning CPU p99 reached 96.3%

Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 432.65 MB/s

Disk full anomaly
Disk full anomaly was detected
NotDetected
Swap thrashing anomaly
Swap thrashing anomaly was detected
Detected

Critical Heavy swap usage (39.4% swap used)

System overload anomaly
System overload anomaly was detected
Detected

Warning 12% of hosts overloaded (load5/ncpus > 1.0)

Additional Host Metrics
Hidden by default. Click to toggle visibility.
CPU usage
Total CPU usage and kernel CPU usage
Total
p5 2.29% < mean 33.05% (SD = 31.03%) < p95 93.27%
System
6.08%
CPU percentiles
CPU usage percentiles
p50
23.26%
p95
93.27%
p99
96.30%
CPU usage above 80%
Number of hosts above 80% CPU and mean time spent above threshold for those hosts
count
15 hosts
mean time
0.66s
Memory used percentage
Percentage of memory used
p5 7.01% < mean 18.6% (SD = 12.46%) < p95 48.01%
Memory available percentage
Percentage of available memory
p5 51.99% < mean 81.4% (SD = 12.46%) < p95 92.99%
Max host memory used
Maximum memory usage percentage across all hosts
max 65.12%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 39.44%
Memory growth rate
Rate of memory growth over time
growth 432.65MB/s
Disk read throughput
Disk read throughput in MB/s
1.23MB/s
Disk write throughput
Disk write throughput in MB/s
497.87MB/s
Disk space utilization risk
Number of hosts nearing disk space capacity by mount point
Mount Point /
0/27hosts
Mount Point /boot
0/2hosts
Mount Point /efi-boot
0/20hosts
Mount Point /etc/hostname
0/36hosts
Mount Point /etc/hosts
0/36hosts
Mount Point /etc/resolv.conf
0/36hosts
Mount Point /nix/store
0/27hosts
System load average
System load averages over 1, 5, and 15 minutes. This is an unnormalised value not divided by number of CPUs, so it is only meaningful if all machines have the same core count.
1 min
3.23
5 min
2.62
15 min
1.94
CPU overloaded hosts
Percentage of hosts that experienced CPU overload
12.50%
CPU pressure
CPU pressure over 10, 60, and 300 second averages
10 second average
p5 0% < mean 7.9135% (SD = 12.7371%) < p95 35.13%
60 second average
7.5013%
300 second average
5.6499%
Memory pressure some
Memory pressure (some tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
Memory pressure full
Memory pressure (all tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
I/O pressure some
I/O pressure (some tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 11.4965% (SD = 15.048%) < p95 41.19%
60 second average
11.0705%
300 second average
9.6758%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 9.2534% (SD = 13.2537%) < p95 38.59%
60 second average
8.9341%
300 second average
7.9926%
Holochain process CPU usage
CPU usage by Holochain process
p5 0% < mean 29.82% (SD = 30.11%) < p95 89.97%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 213.77 KiB < mean 345.75 KiB (SD = 123.20 KiB) < p95592.81 KiB
Holochain process threads
Number of threads in Holochain process
p5 1 threads < mean 28.7 threads (SD = 14.46 threads) < p95 51 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 0 file descriptors < mean 74.97 file descriptors (SD = 29.05 file descriptors) < p95 118 file descriptors

Mixed Arc must_get_agent_activity

A scenario where write agents create entries in batches of 10, while must_get_agent_activity agents each pick a random write agent and repeatedly attempt to create an entry that references the chain top of their latest batch. This reference means that the entry's validation function needs to make a must_get_agent_activity call.

The purpose of this scenario is to measure the time it takes for published agent activity data to be gossiped among authorities and become available to peers that query it via must_get_agent_activity.

This test is similar to Write Validated must_get_agent_activity, but some write agents are zero-arc and all must_get_agent_activity agents are zero-arc. This forces the must_get_agent_activity host call to go to the network.

Started
Thu, 19 Mar 2026 13:04:43 UTC
Peer count
65
Peer count at end
4225
Behaviours
  • full_write (1 agent)
  • zero_must_get_agent_activity (1 agent)
  • zero_write (1 agent)
Holochain version
0.6.1-rc.3
Wind Tunnel version
0.6.0
Run ID
mixed_arc_must_get_agent_activity_23286930829
Highest observed action_seq
The maximum chain length observed per write agent, aggregated across all reading agents. The reading dimension is collapsed by taking the maximum observed value for each write agent (any successful read counts as propagation). This reflects the DHT’s ability to propagate agent activity ops and make them available to querying peers.
Mean max (across write agents)
Mean of the highest chain head value observed per write agent. Each write agent contributes its maximum — the value seen by any reader.
1147.63
Max
Highest chain head value observed for any single write agent.
1292
Write agents observed
8
Chain batch delay timing
The time between a write agent's creation of a batch and a must_get_agent_activity agent's successful discovery of the batch and creation/self-validation of a new entry that depends on it.
Mean
mean 135.782817s (SD = 54.849852s)
Max
Highest per-partition mean latency
max mean 830.781333s
Min
Lowest per-partition mean latency
min mean 40.825028s
Chain batch delay rate
The rate at which a must_get_agent_activity agent was able to discover batches and create/self-validate new entries that depend on them.
Mean
mean 2.09/s
Max
Highest per-partition mean rate
max 2.39/s
Min
Lowest per-partition mean rate
min 1.83/s
create_validated_sample_entry zome call timing
The time taken to complete the zome function call that creates the entry that depends on a write agent's source chain.
Mean
mean 0.932525s (SD = 3.461924s)
Max
Highest per-partition mean latency
max mean 1.780068s
Min
Lowest per-partition mean latency
min mean 0.321687s
Retrieval errors
A running accumulation of the errors encountered by an agent when attempting to self-validate actions that depend on must_get_agent_activity calls.
Total
7647
Agents affected
14 / 14
Mean per agent
Total count divided by number of partitions, rounded to nearest whole number
546
Max
Highest count in any single partition
733
Min
Lowest count in any single partition
336
Open connections
The average number of open connections maintained by an agent over the run, broken down by behaviour.
  • behaviour: full_write
p5 43 < mean 54.68 (SD = 8.52) < p95 61
  • behaviour: zero_must_get_agent_activity
p5 1 < mean 35.02 (SD = 13.7) < p95 48
  • behaviour: zero_write
p5 20 < mean 38.51 (SD = 11.7) < p95 55
Final error count
The total number of all types of error accumulated over the run by all agents.
18766
Host Metrics
User CPU usage
CPU usage by user space
8.95%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 5.32 KiB/s < mean 185.82 KiB/s (SD = 320.01 KiB/s) < p95571.17 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 4.49 KiB/s < mean 157.34 KiB/s (SD = 244.89 KiB/s) < p95577.83 KiB/s
Total bytes received
Total bytes received on primary network interface
count
9.84 GiB
mean
10.28 MiB/s
Total bytes sent
Total bytes sent on primary network interface
count
8.33 GiB
mean
8.70 MiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 725.05 MB/s

Disk full anomaly
Disk full anomaly was detected
NotDetected
Swap thrashing anomaly
Swap thrashing anomaly was detected
Detected

Critical Heavy swap usage (39.4% swap used)

System overload anomaly
System overload anomaly was detected
NotDetected
Additional Host Metrics
Hidden by default. Click to toggle visibility.
CPU usage
Total CPU usage and kernel CPU usage
Total
p5 1.37% < mean 12.34% (SD = 14.54%) < p95 41.9%
System
3.39%
CPU percentiles
CPU usage percentiles
p50
6.91%
p95
41.90%
p99
70.92%
CPU usage above 80%
Number of hosts above 80% CPU and mean time spent above threshold for those hosts
count
12 hosts
mean time
0.02s
Memory used percentage
Percentage of memory used
p5 7.75% < mean 20.6% (SD = 12.99%) < p95 49.58%
Memory available percentage
Percentage of available memory
p5 50.42% < mean 79.4% (SD = 12.99%) < p95 92.25%
Max host memory used
Maximum memory usage percentage across all hosts
max 67.88%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 39.43%
Memory growth rate
Rate of memory growth over time
growth 725.05MB/s
Disk read throughput
Disk read throughput in MB/s
9.85MB/s
Disk write throughput
Disk write throughput in MB/s
380.37MB/s
Disk space utilization risk
Number of hosts nearing disk space capacity by mount point
Mount Point /
0/27hosts
Mount Point /boot
0/2hosts
Mount Point /efi-boot
0/20hosts
Mount Point /etc/hostname
0/36hosts
Mount Point /etc/hosts
0/36hosts
Mount Point /etc/resolv.conf
0/36hosts
Mount Point /nix/store
0/27hosts
System load average
System load averages over 1, 5, and 15 minutes. This is an unnormalised value not divided by number of CPUs, so it is only meaningful if all machines have the same core count.
1 min
1.24
5 min
1.69
15 min
1.99
CPU overloaded hosts
Percentage of hosts that experienced CPU overload
0.00%
CPU pressure
CPU pressure over 10, 60, and 300 second averages
10 second average
p5 0% < mean 1.8626% (SD = 5.0111%) < p95 10.11%
60 second average
1.9069%
300 second average
3.1370%
Memory pressure some
Memory pressure (some tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
Memory pressure full
Memory pressure (all tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
I/O pressure some
I/O pressure (some tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 8.5132% (SD = 12.7994%) < p95 35.5%
60 second average
8.4305%
300 second average
8.9822%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 7.3856% (SD = 11.0512%) < p95 30.85%
60 second average
7.3256%
300 second average
7.6708%
Holochain process CPU usage
CPU usage by Holochain process
p5 0.15% < mean 10.05% (SD = 14.03%) < p95 37.23%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 449.50 KiB < mean 548.82 KiB (SD = 99.90 KiB) < p95716.06 KiB
Holochain process threads
Number of threads in Holochain process
p5 11 threads < mean 29.93 threads (SD = 11.92 threads) < p95 52 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 38 file descriptors < mean 88.83 file descriptors (SD = 30.51 file descriptors) < p95 132 file descriptors

Remote Call Rate

Test the throughput of remote_call operations. Each agent in this scenario waits for a certain number of peers to be available or for up to two minutes, whichever happens first, before starting its behaviour.

Started
Thu, 19 Mar 2026 08:54:56 UTC
Peer count
10
Peer count at end
100
Behaviours
  • default (1 agent)
Holochain version
0.6.1-rc.3
Wind Tunnel version
0.6.0
Run ID
remote_call_rate_23286930829
Dispatch timing
The time between sending a remote call and the remote handler being invoked.
Mean
mean 0.013725s (SD = 0.087496s)
Max
Highest per-partition mean latency
max mean 0.038593s
Min
Lowest per-partition mean latency
min mean -0.146973s
Round-trip timing
The total elapsed time to get a response to the client.
Mean
mean 0.060535s (SD = 0.07582s)
Max
Highest per-partition mean latency
max mean 0.197837s
Min
Lowest per-partition mean latency
min mean 0.036825s
Host Metrics
User CPU usage
CPU usage by user space
8.55%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 16.22 KiB/s < mean 86.80 KiB/s (SD = 444.74 KiB/s) ≤ p9567.59 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 17.20 KiB/s < mean 37.25 KiB/s (SD = 57.06 KiB/s) < p9572.34 KiB/s
Total bytes received
Total bytes received on primary network interface
count
767.93 MiB
mean
845.55 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
329.56 MiB
mean
362.87 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 359.36 MB/s

Disk full anomaly
Disk full anomaly was detected
NotDetected
Swap thrashing anomaly
Swap thrashing anomaly was detected
Detected

Critical Heavy swap usage (23.1% swap used)

System overload anomaly
System overload anomaly was detected
NotDetected
Additional Host Metrics
Hidden by default. Click to toggle visibility.
CPU usage
Total CPU usage and kernel CPU usage
Total
p5 5.63% < mean 13.73% (SD = 10.98%) < p95 32.52%
System
5.18%
CPU percentiles
CPU usage percentiles
p50
10.23%
p95
32.52%
p99
59.90%
CPU usage above 80%
Number of hosts above 80% CPU and mean time spent above threshold for those hosts
count
1 hosts
mean time
0.04s
Memory used percentage
Percentage of memory used
p5 14.16% < mean 22.96% (SD = 11.53%) < p95 52.95%
Memory available percentage
Percentage of available memory
p5 47.05% < mean 77.04% (SD = 11.53%) < p95 85.84%
Max host memory used
Maximum memory usage percentage across all hosts
max 51.99%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 23.08%
Memory growth rate
Rate of memory growth over time
growth 359.36MB/s
Disk read throughput
Disk read throughput in MB/s
0.01MB/s
Disk write throughput
Disk write throughput in MB/s
14.82MB/s
Disk space utilization risk
Number of hosts nearing disk space capacity by mount point
Mount Point /
0/6hosts
Mount Point /efi-boot
0/6hosts
Mount Point /etc/hostname
0/4hosts
Mount Point /etc/hosts
0/4hosts
Mount Point /etc/resolv.conf
0/4hosts
Mount Point /nix/store
0/6hosts
System load average
System load averages over 1, 5, and 15 minutes. This is an unnormalised value not divided by number of CPUs, so it is only meaningful if all machines have the same core count.
1 min
0.73
5 min
0.60
15 min
0.36
CPU overloaded hosts
Percentage of hosts that experienced CPU overload
0.00%
CPU pressure
CPU pressure over 10, 60, and 300 second averages
10 second average
p5 0% < mean 0.4544% (SD = 2.2529%) < p95 1.1%
60 second average
0.4566%
300 second average
0.3717%
Memory pressure some
Memory pressure (some tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
Memory pressure full
Memory pressure (all tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
I/O pressure some
I/O pressure (some tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 1.4758% (SD = 2.0528%) < p95 5.93%
60 second average
1.4308%
300 second average
1.2159%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 1.3163% (SD = 1.8471%) < p95 5.25%
60 second average
1.2728%
300 second average
1.0856%
Holochain process CPU usage
CPU usage by Holochain process
p5 0% < mean 5.98% (SD = 5.37%) < p95 9.32%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 180.28 KiB < mean 207.92 KiB (SD = 22.65 KiB) < p95234.21 KiB
Holochain process threads
Number of threads in Holochain process
p5 1 threads < mean 17.8 threads (SD = 7.05 threads) < p95 26 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 0 file descriptors < mean 52.27 file descriptors (SD = 20.12 file descriptors) < p95 78 file descriptors

Remote Signals

This scenario tests the throughput of remote_signals operations.

Started
Thu, 19 Mar 2026 08:56:53 UTC
Peer count
10
Peer count at end
50
Behaviours
  • default (1 agent)
Holochain version
0.6.1-rc.3
Wind Tunnel version
0.6.0
Run ID
remote_signals_23286930829
Round trip time
The time from origin signal dispatch to origin receive of the remote side's response signal.
mean 0.209243s (SD = 1.162386s) p50 0.119089s p95 0.222545s p99 0.413974s
Timeouts
The number of timeouts waiting for the remote side's response signal (default timeout is 20 seconds).
map[count:1 mean_rate_per_second:1.13 measurement_duration:map[nanos:591246099 secs:9] p5_rate_per_second:0 p95_rate_per_second:6.27 peak_rate_per_second:6.27 rate_trend:map[trend:[0.44 1.82] window_duration:10s] std_rate_per_second:1.98]
Host Metrics
User CPU usage
CPU usage by user space
12.43%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 8.03 KiB/s < mean 68.26 KiB/s (SD = 412.04 KiB/s) ≤ p9565.91 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 8.04 KiB/s < mean 36.47 KiB/s (SD = 22.06 KiB/s) < p9573.73 KiB/s
Total bytes received
Total bytes received on primary network interface
count
298.64 MiB
mean
336.06 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
159.56 MiB
mean
179.55 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
Detected

Warning CPU p99 reached 99.0%

Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 359.49 MB/s

Disk full anomaly
Disk full anomaly was detected
NotDetected
Swap thrashing anomaly
Swap thrashing anomaly was detected
NotDetected
System overload anomaly
System overload anomaly was detected
NotDetected
Additional Host Metrics
Hidden by default. Click to toggle visibility.
CPU usage
Total CPU usage and kernel CPU usage
Total
p5 1.84% < mean 19.88% (SD = 18.81%) < p95 61.19%
System
7.44%
CPU percentiles
CPU usage percentiles
p50
15.34%
p95
61.19%
p99
99.05%
CPU usage above 80%
Number of hosts above 80% CPU and mean time spent above threshold for those hosts
count
2 hosts
mean time
0.03s
Memory used percentage
Percentage of memory used
p5 8.79% < mean 24.45% (SD = 14.65%) < p95 52.97%
Memory available percentage
Percentage of available memory
p5 47.03% < mean 75.55% (SD = 14.65%) < p95 91.21%
Max host memory used
Maximum memory usage percentage across all hosts
max 52.19%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 0.96%
Memory growth rate
Rate of memory growth over time
growth 359.49MB/s
Disk read throughput
Disk read throughput in MB/s
0.01MB/s
Disk write throughput
Disk write throughput in MB/s
11.00MB/s
Disk space utilization risk
Number of hosts nearing disk space capacity by mount point
Mount Point /
0/3hosts
Mount Point /efi-boot
0/2hosts
Mount Point /etc/hostname
0/2hosts
Mount Point /etc/hosts
0/2hosts
Mount Point /etc/resolv.conf
0/2hosts
Mount Point /nix/store
0/3hosts
System load average
System load averages over 1, 5, and 15 minutes. This is an unnormalised value not divided by number of CPUs, so it is only meaningful if all machines have the same core count.
1 min
0.94
5 min
0.80
15 min
0.54
CPU overloaded hosts
Percentage of hosts that experienced CPU overload
0.00%
CPU pressure
CPU pressure over 10, 60, and 300 second averages
10 second average
p5 0% < mean 3.7803% (SD = 9.4087%) < p95 27.34%
60 second average
3.5519%
300 second average
2.4131%
Memory pressure some
Memory pressure (some tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
Memory pressure full
Memory pressure (all tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
I/O pressure some
I/O pressure (some tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 1.6334% (SD = 2.2443%) < p95 6.52%
60 second average
1.6541%
300 second average
1.5083%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 1.4207% (SD = 1.9225%) < p95 5.73%
60 second average
1.4321%
300 second average
1.3111%
Holochain process CPU usage
CPU usage by Holochain process
p5 0% < mean 5.46% (SD = 12.13%) < p95 43.04%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 176.39 KiB < mean 192.55 KiB (SD = 29.95 KiB) < p95224.06 KiB
Holochain process threads
Number of threads in Holochain process
p5 1 threads < mean 13.06 threads (SD = 6.33 threads) < p95 17 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 0 file descriptors < mean 44.45 file descriptors (SD = 24.68 file descriptors) < p95 81 file descriptors

Single-write, many-read

Creates an entry in the agent setup, then read one's own record back. This tests the maximum read performance for reading back local data when the chain is short.

Started
Thu, 19 Mar 2026 08:58:43 UTC
Peer count
1
Peer count at end
1
Behaviours
  • default (1 agent)
Holochain version
0.6.1-rc.3
Wind Tunnel version
0.6.0
Run ID
single_write_many_read_23286930829
read call timing
The time it takes to complete the zome call that retrieves the record.
mean 0.003937s (SD = 0.017358s) p50 0.003122s p95 0.003757s p99 0.007642s
read call rate
The number of read zome calls completed per second.
mean 2501.68/s
Error count
The number of errors collected.
0
Host Metrics
User CPU usage
CPU usage by user space
20.71%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 30.31 KiB/s < mean 135.75 KiB/s (SD = 560.48 KiB/s) ≤ p9539.87 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 31.46 KiB/s < mean 38.62 KiB/s (SD = 14.13 KiB/s) < p9545.29 KiB/s
Total bytes received
Total bytes received on primary network interface
count
41.10 MiB
mean
135.75 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
11.69 MiB
mean
38.62 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
NotDetected
Disk full anomaly
Disk full anomaly was detected
NotDetected
Swap thrashing anomaly
Swap thrashing anomaly was detected
NotDetected
System overload anomaly
System overload anomaly was detected
NotDetected
Additional Host Metrics
Hidden by default. Click to toggle visibility.
CPU usage
Total CPU usage and kernel CPU usage
Total
p5 27.95% < mean 31.14% (SD = 6.81%) < p95 32.41%
System
10.43%
CPU percentiles
CPU usage percentiles
p50
30.58%
p95
32.41%
p99
65.96%
CPU usage above 80%
Number of hosts above 80% CPU and mean time spent above threshold for those hosts
count
0 hosts
mean time
0.00s
Memory used percentage
Percentage of memory used
p5 22.07% < mean 24.36% (SD = 0.73%) < p95 24.94%
Memory available percentage
Percentage of available memory
p5 75.06% < mean 75.64% (SD = 0.73%) < p95 77.93%
Max host memory used
Maximum memory usage percentage across all hosts
max 24.36%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 0.00%
Memory growth rate
Rate of memory growth over time
growth -7.66MB/s
Disk read throughput
Disk read throughput in MB/s
0.00MB/s
Disk write throughput
Disk write throughput in MB/s
5.64MB/s
Disk space utilization risk
Number of hosts nearing disk space capacity by mount point
Mount Point /
0/1hosts
Mount Point /efi-boot
0/1hosts
Mount Point /nix/store
0/1hosts
System load average
System load averages over 1, 5, and 15 minutes. This is an unnormalised value not divided by number of CPUs, so it is only meaningful if all machines have the same core count.
1 min
1.76
5 min
1.25
15 min
0.59
CPU overloaded hosts
Percentage of hosts that experienced CPU overload
0.00%
CPU pressure
CPU pressure over 10, 60, and 300 second averages
10 second average
p5 0.28% < mean 0.7584% (SD = 0.7877%) < p95 2.3%
60 second average
1.4197%
300 second average
1.7319%
Memory pressure some
Memory pressure (some tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
Memory pressure full
Memory pressure (all tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
I/O pressure some
I/O pressure (some tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 3.65% < mean 6.2606% (SD = 1.9946%) < p95 9.52%
60 second average
5.9088%
300 second average
4.0478%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 3.15% < mean 5.1909% (SD = 1.6779%) < p95 8.23%
60 second average
4.8822%
300 second average
3.3850%
Holochain process CPU usage
CPU usage by Holochain process
p5 1.15% < mean 19.79% (SD = 8.28%) < p95 21.35%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 180.26 KiB < mean 217.45 KiB (SD = 40.10 KiB) < p95230.09 KiB
Holochain process threads
Number of threads in Holochain process
p5 7 threads < mean 12.55 threads (SD = 2.52 threads) < p95 17 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 11 file descriptors < mean 58.24 file descriptors (SD = 13.7 file descriptors) < p95 72 file descriptors

Two-party countersigning

This scenario tests the performance of countersigning operations. There are two roles: initiate and participate. The participants commit an entry to advertise that they are willing to participate in sessions. They listen for sessions and participate in one at a time.

Started
Thu, 19 Mar 2026 10:34:24 UTC
Peer count
3
Peer count at end
9
Behaviours
  • initiate (1 agent)
  • participate (1 agent)
Holochain version
0.6.1-rc.3
Wind Tunnel version
0.6.0
Run ID
two_party_countersigning_23286930829
Session accepted -- timing
The duration of the session from acceptance to completion.
Mean
mean 0.400777s (SD = 0.721981s)
Max
Highest per-partition mean latency
max mean 0.432473s
Min
Lowest per-partition mean latency
min mean 0.36908s
Session accepted -- success rate
The number of accepted sessions that completed per second.
Mean
mean 8.57/s
Max
Highest per-partition mean rate
max 8.61/s
Min
Lowest per-partition mean rate
min 8.52/s
Session accepted -- success ratio
Fraction of accepted sessions that completed successfully (0–1).
1
Session initiated -- timing
The duration of the session from initiation to completion.
Mean
mean 0.584198s (SD = 1.028992s)
Max
Highest per-partition mean latency
max mean 0.584198s
Min
Lowest per-partition mean latency
min mean 0.584198s
Session initiated -- success rate
The number of initiated sessions that completed per second.
Mean
mean 17.09/s
Max
Highest per-partition mean rate
max 17.09/s
Min
Lowest per-partition mean rate
min 17.09/s
Session initiated -- success ratio
Fraction of initiated sessions that completed successfully (0–1).
0.9925
Session initiated -- failures
Initiated sessions that failed to complete.
Total
3
Agents affected
1 / 1
Mean per agent
Total count divided by number of partitions, rounded to nearest whole number
3
Max
Highest count in any single partition
3
Min
Lowest count in any single partition
3
Host Metrics
User CPU usage
CPU usage by user space
19.01%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 89.01 KiB/s < mean 165.40 KiB/s (SD = 92.30 KiB/s) < p95239.39 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 49.24 KiB/s < mean 102.78 KiB/s (SD = 32.10 KiB/s) < p95157.98 KiB/s
Total bytes received
Total bytes received on primary network interface
count
145.37 MiB
mean
480.19 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
90.33 MiB
mean
298.39 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 106.37 MB/s

Disk full anomaly
Disk full anomaly was detected
NotDetected
Swap thrashing anomaly
Swap thrashing anomaly was detected
Detected

Warning Moderate swap usage (16.1% swap used)

System overload anomaly
System overload anomaly was detected
NotDetected
Additional Host Metrics
Hidden by default. Click to toggle visibility.
CPU usage
Total CPU usage and kernel CPU usage
Total
p5 12.1% < mean 25.28% (SD = 9.12%) < p95 37.2%
System
6.27%
CPU percentiles
CPU usage percentiles
p50
26.87%
p95
37.20%
p99
56.23%
CPU usage above 80%
Number of hosts above 80% CPU and mean time spent above threshold for those hosts
count
0 hosts
mean time
0.00s
Memory used percentage
Percentage of memory used
p5 22.46% < mean 28.46% (SD = 7.4%) < p95 39.61%
Memory available percentage
Percentage of available memory
p5 60.39% < mean 71.54% (SD = 7.4%) < p95 77.54%
Max host memory used
Maximum memory usage percentage across all hosts
max 39.15%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 16.09%
Memory growth rate
Rate of memory growth over time
growth 106.37MB/s
Disk read throughput
Disk read throughput in MB/s
0.00MB/s
Disk write throughput
Disk write throughput in MB/s
50.39MB/s
Disk space utilization risk
Number of hosts nearing disk space capacity by mount point
Mount Point /
0/2hosts
Mount Point /efi-boot
0/2hosts
Mount Point /etc/hostname
0/1hosts
Mount Point /etc/hosts
0/1hosts
Mount Point /etc/resolv.conf
0/1hosts
Mount Point /nix/store
0/2hosts
System load average
System load averages over 1, 5, and 15 minutes. This is an unnormalised value not divided by number of CPUs, so it is only meaningful if all machines have the same core count.
1 min
2.55
5 min
1.42
15 min
1.12
CPU overloaded hosts
Percentage of hosts that experienced CPU overload
0.00%
CPU pressure
CPU pressure over 10, 60, and 300 second averages
10 second average
p5 0% < mean 1.7534% (SD = 1.9397%) < p95 4.92%
60 second average
1.5271%
300 second average
0.7785%
Memory pressure some
Memory pressure (some tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
Memory pressure full
Memory pressure (all tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
I/O pressure some
I/O pressure (some tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 23.7637% (SD = 19.0904%) < p95 55.43%
60 second average
21.2989%
300 second average
12.0733%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 20.1846% (SD = 16.8531%) < p95 49.6%
60 second average
18.1656%
300 second average
10.4811%
Holochain process CPU usage
CPU usage by Holochain process
p5 0.18% < mean 4.45% (SD = 5.53%) < p95 8.52%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 220.92 KiB < mean 243.79 KiB (SD = 49.66 KiB) < p95262.97 KiB
Holochain process threads
Number of threads in Holochain process
p5 14 threads < mean 24.22 threads (SD = 7.63 threads) < p95 35 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 68 file descriptors < mean 73.9 file descriptors (SD = 8.42 file descriptors) < p95 80 file descriptors

Write/Query

Creates an entry, then queries the source chain and performs a simple operation on the entries, then repeats.

Started
Thu, 19 Mar 2026 09:00:32 UTC
Peer count
1
Peer count at end
1
Behaviours
  • default (1 agent)
Holochain version
0.6.1-rc.3
Wind Tunnel version
0.6.0
Run ID
write_query_23286930829
Write timing
The time it takes to complete the zome function call that writes the entry.
mean 0.044384s (SD = 0.138844s) p50 0.010565s p95 0.272482s p99 0.723224s
Write rate
The number of writes completed per second.
mean 103.04/s
Query timing
The time it takes to complete the chain_query_count_len zome call that queries the source chain.
mean 0.050437s (SD = 0.028046s) p50 0.048712s p95 0.096253s p99 0.110957s
Query rate
The number of chain queries completed per second.
mean 103/s
Error count
The number of errors accumulated during the run.
0
Host Metrics
User CPU usage
CPU usage by user space
22.46%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 919 B/s < mean 1.14 KiB/s (SD = 608 B/s) < p951.49 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 121 B/s < mean 855 B/s (SD = 810 B/s) < p951.63 KiB/s
Total bytes received
Total bytes received on primary network interface
count
342.76 KiB
mean
1.14 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
250.58 KiB
mean
855 B/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
NotDetected
Disk full anomaly
Disk full anomaly was detected
NotDetected
Swap thrashing anomaly
Swap thrashing anomaly was detected
NotDetected
System overload anomaly
System overload anomaly was detected
NotDetected
Additional Host Metrics
Hidden by default. Click to toggle visibility.
CPU usage
Total CPU usage and kernel CPU usage
Total
p5 16.95% < mean 26.85% (SD = 7.31%) < p95 33.38%
System
4.40%
CPU percentiles
CPU usage percentiles
p50
26.64%
p95
33.38%
p99
57.86%
CPU usage above 80%
Number of hosts above 80% CPU and mean time spent above threshold for those hosts
count
0 hosts
mean time
0.00s
Memory used percentage
Percentage of memory used
p5 14.74% < mean 14.94% (SD = 0.45%) < p95 15.66%
Memory available percentage
Percentage of available memory
p5 84.34% < mean 85.06% (SD = 0.45%) < p95 85.26%
Max host memory used
Maximum memory usage percentage across all hosts
max 14.94%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 0.00%
Memory growth rate
Rate of memory growth over time
growth -55.51MB/s
Disk read throughput
Disk read throughput in MB/s
0.00MB/s
Disk write throughput
Disk write throughput in MB/s
8.71MB/s
Disk space utilization risk
Number of hosts nearing disk space capacity by mount point
Mount Point /
0/1hosts
Mount Point /efi-boot
0/1hosts
Mount Point /nix/store
0/1hosts
System load average
System load averages over 1, 5, and 15 minutes. This is an unnormalised value not divided by number of CPUs, so it is only meaningful if all machines have the same core count.
1 min
1.46
5 min
0.70
15 min
0.28
CPU overloaded hosts
Percentage of hosts that experienced CPU overload
0.00%
CPU pressure
CPU pressure over 10, 60, and 300 second averages
10 second average
p5 0% < mean 0.0165% (SD = 0.0517%) < p95 0.12%
60 second average
0.0129%
300 second average
0.0013%
Memory pressure some
Memory pressure (some tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
Memory pressure full
Memory pressure (all tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
I/O pressure some
I/O pressure (some tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 7.9% < mean 13.4974% (SD = 5.158%) < p95 23.79%
60 second average
12.4852%
300 second average
6.7571%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 7.67% < mean 13.0545% (SD = 4.9565%) < p95 22.89%
60 second average
12.0700%
300 second average
6.5403%
Holochain process CPU usage
CPU usage by Holochain process
p5 15.69% < mean 25.78% (SD = 7.45%) < p95 32.68%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 204.82 KiB < mean 217.54 KiB (SD = 14.58 KiB) < p95234.20 KiB
Holochain process threads
Number of threads in Holochain process
p5 14 threads ≤ mean 13.77 threads (SD = 1.26 threads) < p95 14 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 59 file descriptors < mean 59.7 file descriptors (SD = 7.31 file descriptors) < p95 66 file descriptors

Write/Read

Creates an entry and reads it back, then repeats.

Started
Thu, 19 Mar 2026 09:02:21 UTC
Peer count
1
Peer count at end
1
Behaviours
  • default (1 agent)
Holochain version
0.6.1-rc.3
Wind Tunnel version
0.6.0
Run ID
write_read_23286930829
Write timing
The time taken to write the entry.
mean 0.078753s (SD = 0.215978s) p50 0.017098s p95 0.543482s p99 1.132889s
Write rate
The number of writes completed per second.
mean 97.32/s
Read timing
The time taken to read the entry.
mean 0.020656s (SD = 0.020869s) p50 0.017826s p95 0.04086s p99 0.057181s
Read rate
The number of reads completed per second.
mean 97.32/s
Error count
The number of errors accumulated over the run.
0
Host Metrics
User CPU usage
CPU usage by user space
17.80%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 98 B/s < mean 428 B/s (SD = 667 B/s) < p951019 B/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 25 B/s < mean 305 B/s (SD = 527 B/s) < p95783 B/s
Total bytes received
Total bytes received on primary network interface
count
125.50 KiB
mean
428 B/s
Total bytes sent
Total bytes sent on primary network interface
count
89.48 KiB
mean
305 B/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
NotDetected
Disk full anomaly
Disk full anomaly was detected
NotDetected
Swap thrashing anomaly
Swap thrashing anomaly was detected
NotDetected
System overload anomaly
System overload anomaly was detected
NotDetected
Additional Host Metrics
Hidden by default. Click to toggle visibility.
CPU usage
Total CPU usage and kernel CPU usage
Total
p5 10.44% < mean 20.44% (SD = 7.74%) < p95 25.28%
System
2.64%
CPU percentiles
CPU usage percentiles
p50
20.63%
p95
25.28%
p99
57.66%
CPU usage above 80%
Number of hosts above 80% CPU and mean time spent above threshold for those hosts
count
0 hosts
mean time
0.00s
Memory used percentage
Percentage of memory used
p5 27.83% < mean 27.88% (SD = 0.55%) < p95 28.08%
Memory available percentage
Percentage of available memory
p5 71.92% < mean 72.12% (SD = 0.55%) < p95 72.17%
Max host memory used
Maximum memory usage percentage across all hosts
max 27.88%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 0.00%
Memory growth rate
Rate of memory growth over time
growth -46.12MB/s
Disk read throughput
Disk read throughput in MB/s
0.00MB/s
Disk write throughput
Disk write throughput in MB/s
8.33MB/s
Disk space utilization risk
Number of hosts nearing disk space capacity by mount point
Mount Point /etc/hostname
0/1hosts
Mount Point /etc/hosts
0/1hosts
Mount Point /etc/resolv.conf
0/1hosts
System load average
System load averages over 1, 5, and 15 minutes. This is an unnormalised value not divided by number of CPUs, so it is only meaningful if all machines have the same core count.
1 min
1.67
5 min
0.79
15 min
0.32
CPU overloaded hosts
Percentage of hosts that experienced CPU overload
0.00%
CPU pressure
CPU pressure over 10, 60, and 300 second averages
10 second average
p5 0.25% < mean 0.5855% (SD = 0.2819%) < p95 1.03%
60 second average
0.5303%
300 second average
0.2623%
Memory pressure some
Memory pressure (some tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
Memory pressure full
Memory pressure (all tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
I/O pressure some
I/O pressure (some tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 10.32% < mean 24.3942% (SD = 6.7676%) < p95 38.02%
60 second average
20.4558%
300 second average
9.9068%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 10.2% < mean 23.7745% (SD = 6.5285%) < p95 36.71%
60 second average
19.9348%
300 second average
9.6542%
Holochain process CPU usage
CPU usage by Holochain process
p5 8.92% < mean 18.52% (SD = 8.42%) < p95 23.85%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 237.67 KiB ≤ mean 236.23 KiB (SD = 39.35 KiB) < p95247.46 KiB
Holochain process threads
Number of threads in Holochain process
p5 9 threads < mean 13.97 threads (SD = 2.66 threads) < p95 15 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 25 file descriptors < mean 57.13 file descriptors (SD = 12.23 file descriptors) < p95 62 file descriptors

Write validated

Creates an entry, updates it and links the create to the update, then repeats. Each of the three actions is validated by the included hApp.

Started
Thu, 19 Mar 2026 09:04:09 UTC
Peer count
1
Peer count at end
1
Behaviours
  • default (1 agent)
Holochain version
0.6.1-rc.3
Wind Tunnel version
0.6.0
Run ID
write_validated_23286930829
Write timing
The time it takes to complete the zome function call that writes the entry, updates it, and links to the update.
mean 0.039834s (SD = 0.018074s) p50 0.03848s p95 0.074563s p99 0.088997s
Write rate
The number of write zome function calls that complete per second.
mean 98.04/s
Read timing
The time it takes to complete the zome function call that reads the data.
mean 0.062618s (SD = 0.021214s) p50 0.060245s p95 0.102356s p99 0.121076s
Read rate
The number of read zome function calls that complete per second.
mean 98.04/s
Error count
The number of errors accumulated over the run.
0
Host Metrics
User CPU usage
CPU usage by user space
21.04%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 69 B/s < mean 209.54 KiB/s (SD = 881.75 KiB/s) < p951.72 MiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 215 B/s < mean 6.40 KiB/s (SD = 23.48 KiB/s) < p9554.99 KiB/s
Total bytes received
Total bytes received on primary network interface
count
63.44 MiB
mean
209.54 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
1.94 MiB
mean
6.40 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 153.86 MB/s

Disk full anomaly
Disk full anomaly was detected
NotDetected
Swap thrashing anomaly
Swap thrashing anomaly was detected
NotDetected
System overload anomaly
System overload anomaly was detected
NotDetected
Additional Host Metrics
Hidden by default. Click to toggle visibility.
CPU usage
Total CPU usage and kernel CPU usage
Total
p5 16.61% < mean 25.34% (SD = 5.58%) < p95 27.85%
System
4.30%
CPU percentiles
CPU usage percentiles
p50
26.84%
p95
27.85%
p99
39.34%
CPU usage above 80%
Number of hosts above 80% CPU and mean time spent above threshold for those hosts
count
0 hosts
mean time
0.00s
Memory used percentage
Percentage of memory used
p5 6.37% < mean 10.19% (SD = 1.08%) < p95 11.19%
Memory available percentage
Percentage of available memory
p5 88.81% < mean 89.81% (SD = 1.08%) < p95 93.63%
Max host memory used
Maximum memory usage percentage across all hosts
max 10.19%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 0.02%
Memory growth rate
Rate of memory growth over time
growth 153.86MB/s
Disk read throughput
Disk read throughput in MB/s
0.00MB/s
Disk write throughput
Disk write throughput in MB/s
23.06MB/s
Disk space utilization risk
Number of hosts nearing disk space capacity by mount point
Mount Point /
0/1hosts
Mount Point /efi-boot
0/1hosts
Mount Point /nix/store
0/1hosts
System load average
System load averages over 1, 5, and 15 minutes. This is an unnormalised value not divided by number of CPUs, so it is only meaningful if all machines have the same core count.
1 min
1.62
5 min
0.75
15 min
0.30
CPU overloaded hosts
Percentage of hosts that experienced CPU overload
0.00%
CPU pressure
CPU pressure over 10, 60, and 300 second averages
10 second average
p5 0% < mean 0.0081% (SD = 0.0327%) < p95 0.06%
60 second average
0.0031%
300 second average
0.0000%
Memory pressure some
Memory pressure (some tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
Memory pressure full
Memory pressure (all tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
I/O pressure some
I/O pressure (some tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 0.1147% (SD = 0.201%) < p95 0.61%
60 second average
0.1078%
300 second average
0.0528%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 0.0984% (SD = 0.1908%) < p95 0.61%
60 second average
0.0947%
300 second average
0.0469%
Holochain process CPU usage
CPU usage by Holochain process
p5 17.42% < mean 25.02% (SD = 3.09%) < p95 27.28%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 479.61 KiB < mean 482.96 KiB (SD = 25.95 KiB) < p95489.87 KiB
Holochain process threads
Number of threads in Holochain process
p5 17 threads < mean 17.17 threads (SD = 1.1 threads) ≤ p95 17 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 64 file descriptors < mean 65.5 file descriptors (SD = 2.38 file descriptors) < p95 70 file descriptors

Zero-Arc Create and Read

A zero-arc/full-arc mixed scenario with two types of zero-arc nodes -- ones that create data and ones that read data -- as well as full arc nodes to "relay" the data. The scenario has three roles:

  • zero_write: A zero-arc conductor that just creates entries with a timestamp field. Those entries are linked to a known base hash so that zero_read nodes can retrieve them.
  • zero_read: A zero-arc conductor that reads the entries created by the zero-arc node(s) and records the time lag between when the entry had been created and when it was first discovered.
  • full: A full-arc conductor that is just here to serve entries to zero arc nodes.
Started
Thu, 19 Mar 2026 11:55:18 UTC
Peer count
65
Peer count at end
4225
Behaviours
  • full (1 agent)
  • zero_read (1 agent)
  • zero_write (1 agent)
Holochain version
0.6.1-rc.3
Wind Tunnel version
0.6.0
Run ID
zero_arc_create_and_read_23286930829
Create rate
The number of timed entries created by the zero-arc write node(s) per second.
Mean
mean 64.82/s
Max
Highest per-partition mean rate
max 130.28/s
Min
Lowest per-partition mean rate
min 25.97/s
Fetch lag timing
For each entry, the time lag between when it was created and when a zero-arc read node fetched it from the network via the get_timed_entries_network zome function.
Mean
mean 254.51443s (SD = 15.11536s)
Max
Highest per-partition mean latency
max mean 901.304876s
Min
Lowest per-partition mean latency
min mean 168.405644s
Fetch lag rate
The number of entries per second fetched by zero-arc read nodes.
Mean
mean 3/s
Max
Highest per-partition mean rate
max 44/s
Min
Lowest per-partition mean rate
min 0/s
Open connections
The number of currently open connections to other conductors.
full-arc
p5 0 < mean 39.14 (SD = 24.98) < p95 61
zero-arc
p5 10 < mean 34.91 (SD = 12.52) < p95 50
Error count
The number of errors accumulated across all nodes.
266

Zome Call, Single Value

Calls a zome function that returns a fixed value. This tests the maximum performance of zome calls when the zome function is not calling into Holochain other otherwise doing any work.

Started
Thu, 19 Mar 2026 09:06:21 UTC
Peer count
1
Peer count at end
1
Behaviours
  • default (1 agent)
Holochain version
0.6.1-rc.3
Wind Tunnel version
0.6.0
Run ID
zome_call_single_value_23286930829
Call timing
The time taken for the call to complete.
mean 0.004393s (SD = 0.001586s) p50 0.003911s p95 0.006924s p99 0.011385s
Call rate
The number of zome calls completed per second.
mean 2248.64/s
Error count
The number of errors accumulated during the run.
0
Host Metrics
User CPU usage
CPU usage by user space
35.71%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 17.57 KiB/s < mean 22.01 KiB/s (SD = 2.98 KiB/s) < p9526.03 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 23.44 KiB/s < mean 28.89 KiB/s (SD = 2.93 KiB/s) < p9532.74 KiB/s
Total bytes received
Total bytes received on primary network interface
count
6.23 MiB
mean
22.01 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
8.18 MiB
mean
28.89 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
NotDetected
Disk full anomaly
Disk full anomaly was detected
NotDetected
Swap thrashing anomaly
Swap thrashing anomaly was detected
NotDetected
System overload anomaly
System overload anomaly was detected
NotDetected
Additional Host Metrics
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CPU usage
Total CPU usage and kernel CPU usage
Total
p5 60.2% < mean 61.98% (SD = 4.41%) < p95 62.31%
System
26.27%
CPU percentiles
CPU usage percentiles
p50
61.11%
p95
62.31%
p99
85.04%
CPU usage above 80%
Number of hosts above 80% CPU and mean time spent above threshold for those hosts
count
1 hosts
mean time
0.03s
Memory used percentage
Percentage of memory used
p5 21.62% < mean 21.99% (SD = 0.5%) < p95 22.84%
Memory available percentage
Percentage of available memory
p5 77.16% < mean 78.01% (SD = 0.5%) < p95 78.38%
Max host memory used
Maximum memory usage percentage across all hosts
max 21.99%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 0.00%
Memory growth rate
Rate of memory growth over time
growth -74.44MB/s
Disk read throughput
Disk read throughput in MB/s
0.00MB/s
Disk write throughput
Disk write throughput in MB/s
6.82MB/s
Disk space utilization risk
Number of hosts nearing disk space capacity by mount point
Mount Point /etc/hostname
0/1hosts
Mount Point /etc/hosts
0/1hosts
Mount Point /etc/resolv.conf
0/1hosts
System load average
System load averages over 1, 5, and 15 minutes. This is an unnormalised value not divided by number of CPUs, so it is only meaningful if all machines have the same core count.
1 min
1.43
5 min
0.82
15 min
0.59
CPU overloaded hosts
Percentage of hosts that experienced CPU overload
0.00%
CPU pressure
CPU pressure over 10, 60, and 300 second averages
10 second average
p5 13.17% < mean 26.0623% (SD = 4.5402%) < p95 28.51%
60 second average
22.2667%
300 second average
11.7907%
Memory pressure some
Memory pressure (some tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
Memory pressure full
Memory pressure (all tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
60 second average
0.0000%
300 second average
0.0000%
I/O pressure some
I/O pressure (some tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 0.03% (SD = 0.0837%) < p95 0.22%
60 second average
0.0247%
300 second average
0.0047%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 0.0107% (SD = 0.0415%) < p95 0.08%
60 second average
0.0077%
300 second average
0.0007%
Holochain process CPU usage
CPU usage by Holochain process
p5 42.8% < mean 44.07% (SD = 5.03%) ≤ p95 43.66%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 219.22 KiB ≤ mean 216.25 KiB (SD = 24.16 KiB) < p95221.90 KiB
Holochain process threads
Number of threads in Holochain process
p5 11 threads < mean 11.87 threads (SD = 0.43 threads) < p95 12 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 47 file descriptors < mean 50.83 file descriptors (SD = 7.59 file descriptors) < p95 66 file descriptors