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
Tue, 24 Mar 2026 17:26:05 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_23502164148
First install time
The time from conductor startup to completion of the first app installation attempt.
1.960678459s
Install app timing
The time taken to install an app.
mean 1.06212s (SD = 0.67401s) p50 0.836254s p95 2.484198s p99 2.791923s
Host Metrics
User CPU usage
CPU usage by user space
27.88%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 28.43 KiB/s < mean 706.79 KiB/s (SD = 1.14 MiB/s) < p952.67 MiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 17.81 KiB/s < mean 38.55 KiB/s (SD = 35.72 KiB/s) < p95100.43 KiB/s
Total bytes received
Total bytes received on primary network interface
count
82.83 MiB
mean
706.79 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
4.52 MiB
mean
38.55 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 1073.46 MB/s

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

Critical Heavy swap usage (86.2% 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 29.27% < mean 37.76% (SD = 6.46%) < p95 46.96%
System
9.89%
CPU percentiles
CPU usage percentiles
p50
35.07%
p95
46.96%
p99
46.96%
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 64.51% < mean 69.7% (SD = 3.62%) < p95 73.95%
Memory available percentage
Percentage of available memory
p5 26.05% < mean 30.3% (SD = 3.62%) < p95 35.49%
Max host memory used
Maximum memory usage percentage across all hosts
max 69.70%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 86.18%
Memory growth rate
Rate of memory growth over time
growth 1073.46MB/s
Disk read throughput
Disk read throughput in MB/s
0.01MB/s
Disk write throughput
Disk write throughput in MB/s
12.22MB/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
2.58
5 min
1.93
15 min
1.36
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 5.505% < mean 7.0297% (SD = 1.0829%) < p95 8.2933%
60 second average
5.9200%
300 second average
4.1740%
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 11.385% < mean 26.007% (SD = 7.4438%) < p95 31.4967%
60 second average
20.9223%
300 second average
14.0183%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 8.64% < mean 18.532% (SD = 5.0439%) < p95 22.22%
60 second average
15.2690%
300 second average
10.7613%
Holochain process CPU usage
CPU usage by Holochain process
p5 0% < mean 17.01% (SD = 10.1%) < p95 29.18%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 23.90 KiB < mean 190.37 KiB (SD = 87.59 KiB) < p95249.82 KiB
Holochain process threads
Number of threads in Holochain process
p5 9.5 threads < mean 12.3 threads (SD = 1.71 threads) < p95 14.67 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 31.5 file descriptors < mean 54.03 file descriptors (SD = 13.92 file descriptors) < p95 67 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
Tue, 24 Mar 2026 17:28:34 UTC
Peer count
1
Behaviours
  • minimal (1 agent)
Holochain version
0.6.1-rc.3
Wind Tunnel version
0.6.0
Run ID
app_install_minimal_23502164148
First install time
The time from conductor startup to completion of the first app installation attempt.
0.21034968s
Install app timing
The time taken to install an app.
mean 0.036722s (SD = 0.003223s) p50 0.036282s p95 0.04279s p99 0.046565s
Host Metrics
User CPU usage
CPU usage by user space
13.48%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 642 B/s < mean 18.24 KiB/s (SD = 17.61 KiB/s) < p9535.85 KiB/s
Not enough time data to show a trend.
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 130 B/s < mean 4.95 KiB/s (SD = 4.82 KiB/s) < p959.77 KiB/s
Not enough time data to show a trend.
Total bytes received
Total bytes received on primary network interface
count
1.07 MiB
mean
18.24 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
296.84 KiB
mean
4.95 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 2275.78 MB/s

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

Critical Heavy swap usage (46.4% 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 17.85% < mean 18.72% (SD = 1.15%) < p95 20.35%
System
5.24%
CPU percentiles
CPU usage percentiles
p50
17.97%
p95
20.35%
p99
20.35%
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 32.82% < mean 45.85% (SD = 9.32%) < p95 54.09%
Memory available percentage
Percentage of available memory
p5 45.91% < mean 54.15% (SD = 9.32%) < p95 67.18%
Max host memory used
Maximum memory usage percentage across all hosts
max 45.85%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 46.43%
Memory growth rate
Rate of memory growth over time
growth 2275.78MB/s
Disk read throughput
Disk read throughput in MB/s
3.06MB/s
Disk write throughput
Disk write throughput in MB/s
123.12MB/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
1.49
5 min
0.60
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 0.1239% (SD = 0.1435%) < p95 0.325%
60 second average
0.0694%
300 second average
0.0139%
Memory pressure some
Memory pressure (some tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% < mean 0.3933% (SD = 0.3706%) < p95 0.89%
60 second average
0.1233%
300 second average
0.0278%
Memory pressure full
Memory pressure (all tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% < mean 0.3933% (SD = 0.3706%) < p95 0.89%
60 second average
0.1233%
300 second average
0.0278%
I/O pressure some
I/O pressure (some tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 0.0244% (SD = 0.0278%) < p95 0.0633%
60 second average
0.0122%
300 second average
0.0000%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 0.0244% (SD = 0.0278%) < p95 0.0633%
60 second average
0.0122%
300 second average
0.0000%
Holochain process CPU usage
CPU usage by Holochain process
p5 12.62% < mean 14.32% (SD = 1.88%) < p95 16.94%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 579.02 KiB < mean 1.52 MiB (SD = 694.48 KiB) < p952.00 MiB
Holochain process threads
Number of threads in Holochain process
p5 21 threads < mean 21.67 threads (SD = 0.47 threads) < p95 22 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 375.5 file descriptors < mean 807.17 file descriptors (SD = 305.23 file descriptors) < p95 1023 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
Tue, 24 Mar 2026 17:04:58 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_23502164148
Zome call timing
The time elapsed between start of install and calling init.
mean 0.016522s (SD = 0.029337s) p50 0.009638s p95 0.02156s p99 0.186599s
Host Metrics
User CPU usage
CPU usage by user space
16.31%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 9.22 KiB/s < mean 23.11 KiB/s (SD = 7.17 KiB/s) < p9528.24 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 2.68 KiB/s < mean 6.90 KiB/s (SD = 2.12 KiB/s) < p958.16 KiB/s
Total bytes received
Total bytes received on primary network interface
count
3.39 MiB
mean
23.11 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
1.01 MiB
mean
6.90 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 740.67 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 11.39% < mean 18.84% (SD = 16.31%) < p95 55.3%
System
2.52%
CPU percentiles
CPU usage percentiles
p50
11.68%
p95
55.30%
p99
55.30%
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 15.59% < mean 19.81% (SD = 2.79%) < p95 23.53%
Memory available percentage
Percentage of available memory
p5 76.47% < mean 80.19% (SD = 2.79%) < p95 84.41%
Max host memory used
Maximum memory usage percentage across all hosts
max 19.81%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 0.01%
Memory growth rate
Rate of memory growth over time
growth 740.67MB/s
Disk read throughput
Disk read throughput in MB/s
0.00MB/s
Disk write throughput
Disk write throughput in MB/s
3.94MB/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
1.29
5 min
0.55
15 min
0.49
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 0.0733% (SD = 0.0929%) < p95 0.24%
60 second average
0.0636%
300 second average
0.0172%
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 12.035% < mean 29.0575% (SD = 7.8891%) < p95 35.5%
60 second average
20.5286%
300 second average
9.0114%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 11.66% < mean 28.41% (SD = 7.7315%) < p95 34.57%
60 second average
20.0769%
300 second average
8.8194%
Holochain process CPU usage
CPU usage by Holochain process
p5 10.24% < mean 17.69% (SD = 16.26%) < p95 54.04%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 275.49 KiB < mean 613.53 KiB (SD = 212.49 KiB) < p95872.92 KiB
Holochain process threads
Number of threads in Holochain process
p5 15.5 threads < mean 18.69 threads (SD = 1.52 threads) < p95 20 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 86 file descriptors < mean 490.83 file descriptors (SD = 208.26 file descriptors) < p95 640.33 file descriptors

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
Tue, 24 Mar 2026 17:07:27 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_23502164148
Send timing
The time taken to emit a batch of 10,000 signals.
mean 0.43618s (SD = 0.185627s) p50 0.430609s p95 0.706739s p99 0.706739s
Receive timing
The time taken to receive the completed batch, to the nearest 250ms.
mean 27.746557s (SD = 4.509452s) p50 30.001079s p95 30.002071s p99 30.002071s
Success ratio
The proportion of signals successfully received in a batch.
min 0.9833999872207642 < mean 0.9927 (SD = 0.0061) < max 0.9994000196456908
Host Metrics
User CPU usage
CPU usage by user space
2.69%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 80 B/s < mean 153 B/s (SD = 66 B/s) < p95226 B/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 127 B/s < mean 185 B/s (SD = 39 B/s) < p95225 B/s
Total bytes received
Total bytes received on primary network interface
count
17.94 KiB
mean
153 B/s
Total bytes sent
Total bytes sent on primary network interface
count
21.66 KiB
mean
185 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 1.24% < mean 3.74% (SD = 4.32%) < p95 12.37%
System
1.05%
CPU percentiles
CPU usage percentiles
p50
1.69%
p95
12.37%
p99
12.37%
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 7.96% < mean 8.45% (SD = 0.25%) < p95 8.64%
Memory available percentage
Percentage of available memory
p5 91.36% < mean 91.55% (SD = 0.25%) < p95 92.04%
Max host memory used
Maximum memory usage percentage across all hosts
max 8.45%
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 -25.73MB/s
Disk read throughput
Disk read throughput in MB/s
0.00MB/s
Disk write throughput
Disk write throughput in MB/s
1.33MB/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
0.12
5 min
0.08
15 min
0.15
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 0.1167% < mean 0.2087% (SD = 0.092%) < p95 0.3633%
60 second average
0.1007%
300 second average
0.0220%
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 0.2167% (SD = 0.2575%) < p95 0.6767%
60 second average
0.2027%
300 second average
0.0733%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 0.2167% (SD = 0.2575%) < p95 0.6767%
60 second average
0.2027%
300 second average
0.0733%
Holochain process CPU usage
CPU usage by Holochain process
p5 0.11% < mean 0.19% (SD = 0.04%) < p95 0.21%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 302.43 KiB < mean 305.04 KiB (SD = 1.52 KiB) < p95306.50 KiB
Holochain process threads
Number of threads in Holochain process
p5 15 threads ≤ mean 15 threads (SD = 0 threads) ≤ p95 15 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 49.33 file descriptors < mean 60.87 file descriptors (SD = 11.1 file descriptors) < p95 74 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
Tue, 24 Mar 2026 17:09:55 UTC
Peer count
10
Peer count at end
19
Behaviours
  • default (1 agent)
Holochain version
0.6.1-rc.3
Wind Tunnel version
0.6.0
Run ID
remote_call_rate_23502164148
Dispatch timing
The time between sending a remote call and the remote handler being invoked.
Mean
mean 0.058775s (SD = 0.117099s)
Max
Highest per-partition mean latency
max mean 0.13787s
Min
Lowest per-partition mean latency
min mean 0.031326s
Round-trip timing
The total elapsed time to get a response to the client.
Mean
mean 0.113225s (SD = 0.155173s)
Max
Highest per-partition mean latency
max mean 0.249003s
Min
Lowest per-partition mean latency
min mean 0.069301s
Host Metrics
User CPU usage
CPU usage by user space
7.45%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 10.61 KiB/s < mean 16.57 KiB/s (SD = 5.43 KiB/s) < p9526.74 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 10.04 KiB/s < mean 15.94 KiB/s (SD = 6.14 KiB/s) < p9527.80 KiB/s
Total bytes received
Total bytes received on primary network interface
count
17.47 MiB
mean
149.09 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
16.81 MiB
mean
143.45 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 40.65 MB/s

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

Critical Heavy swap usage (86.2% 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 2.43% < mean 10.42% (SD = 9.14%) < p95 28.39%
System
2.98%
CPU percentiles
CPU usage percentiles
p50
6.62%
p95
28.39%
p99
42.60%
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 8.25% < mean 32.11% (SD = 23.59%) < p95 77.55%
Memory available percentage
Percentage of available memory
p5 22.45% < mean 67.89% (SD = 23.59%) < p95 91.75%
Max host memory used
Maximum memory usage percentage across all hosts
max 77.65%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 86.16%
Memory growth rate
Rate of memory growth over time
growth 40.65MB/s
Disk read throughput
Disk read throughput in MB/s
0.09MB/s
Disk write throughput
Disk write throughput in MB/s
16.80MB/s
Disk space utilization risk
Number of hosts nearing disk space capacity by mount point
Mount Point /
0/3hosts
Mount Point /efi-boot
0/1hosts
Mount Point /etc/hostname
0/5hosts
Mount Point /etc/hosts
0/5hosts
Mount Point /etc/resolv.conf
0/5hosts
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
0.52
5 min
0.33
15 min
0.46
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 0.5659% < mean 0.8044% (SD = 0.2616%) < p95 1.2627%
60 second average
0.6315%
300 second average
0.3619%
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 0.3878% < mean 1.2305% (SD = 0.844%) < p95 2.5523%
60 second average
1.1681%
300 second average
0.7515%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0.3604% < mean 1.1465% (SD = 0.7801%) < p95 2.3504%
60 second average
1.0999%
300 second average
0.7075%
Holochain process CPU usage
CPU usage by Holochain process
p5 1.07% < mean 5.01% (SD = 5.45%) < p95 17.3%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 191.30 KiB < mean 219.99 KiB (SD = 35.93 KiB) < p95255.04 KiB
Holochain process threads
Number of threads in Holochain process
p5 9 threads < mean 17.76 threads (SD = 5.34 threads) < p95 33 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 38.67 file descriptors < mean 65.38 file descriptors (SD = 16.76 file descriptors) < p95 96 file descriptors

Remote Signals

This scenario tests the throughput of remote_signals operations.

Started
Tue, 24 Mar 2026 17:12:21 UTC
Peer count
10
Peer count at end
10
Behaviours
  • default (1 agent)
Holochain version
0.6.1-rc.3
Wind Tunnel version
0.6.0
Run ID
remote_signals_23502164148
Round trip time
The time from origin signal dispatch to origin receive of the remote side's response signal.
mean 0.202081s (SD = 0.781514s) p50 0.112724s p95 0.130173s p99 4.189372s
Timeouts
The number of timeouts waiting for the remote side's response signal (default timeout is 20 seconds).
0
Host Metrics
User CPU usage
CPU usage by user space
10.02%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 6.58 KiB/s < mean 125.58 KiB/s (SD = 274.86 KiB/s) < p951.23 MiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 5.73 KiB/s < mean 24.98 KiB/s (SD = 36.25 KiB/s) < p95149.43 KiB/s
Total bytes received
Total bytes received on primary network interface
count
73.58 MiB
mean
627.92 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
14.64 MiB
mean
124.92 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 491.01 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 3.11% < mean 12.33% (SD = 16.94%) < p95 56.32%
System
2.31%
CPU percentiles
CPU usage percentiles
p50
4.24%
p95
56.32%
p99
65.44%
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 12.94% < mean 21.25% (SD = 9.59%) < p95 32.56%
Memory available percentage
Percentage of available memory
p5 67.44% < mean 78.75% (SD = 9.59%) < p95 87.06%
Max host memory used
Maximum memory usage percentage across all hosts
max 37.12%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 9.87%
Memory growth rate
Rate of memory growth over time
growth 491.01MB/s
Disk read throughput
Disk read throughput in MB/s
0.82MB/s
Disk write throughput
Disk write throughput in MB/s
21.52MB/s
Disk space utilization risk
Number of hosts nearing disk space capacity by mount point
Mount Point /
0/4hosts
Mount Point /efi-boot
0/4hosts
Mount Point /etc/hostname
0/1hosts
Mount Point /etc/hosts
0/1hosts
Mount Point /etc/resolv.conf
0/1hosts
Mount Point /nix/store
0/4hosts
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
0.98
5 min
0.60
15 min
0.48
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 0.018% < mean 4.5876% (SD = 4.2492%) < p95 9.8287%
60 second average
3.9521%
300 second average
1.5386%
Memory pressure some
Memory pressure (some tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% < mean 0.0037% (SD = 0.0075%) < p95 0.0187%
60 second average
0.0031%
300 second average
0.0001%
Memory pressure full
Memory pressure (all tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% < mean 0.0037% (SD = 0.0075%) < p95 0.0187%
60 second average
0.0031%
300 second average
0.0001%
I/O pressure some
I/O pressure (some tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 1.085% < mean 4.5833% (SD = 3.8853%) < p95 11.0473%
60 second average
4.5093%
300 second average
3.5531%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 1.043% < mean 4.1309% (SD = 3.3824%) < p95 9.6913%
60 second average
4.1156%
300 second average
3.3585%
Holochain process CPU usage
CPU usage by Holochain process
p5 0.2% < mean 6.25% (SD = 11.17%) < p95 29.9%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 148.11 KiB < mean 198.71 KiB (SD = 23.02 KiB) < p95215.07 KiB
Holochain process threads
Number of threads in Holochain process
p5 13 threads < mean 16.68 threads (SD = 2.78 threads) < p95 20 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 48 file descriptors < mean 64.86 file descriptors (SD = 16.88 file descriptors) < p95 88 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
Tue, 24 Mar 2026 17:14:33 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_23502164148
read call timing
The time it takes to complete the zome call that retrieves the record.
mean 0.0041s (SD = 0.016416s) p50 0.003386s p95 0.003916s p99 0.007175s
read call rate
The number of read zome calls completed per second.
mean 2394.58/s
Error count
The number of errors collected.
0
Host Metrics
User CPU usage
CPU usage by user space
23.01%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 4.80 KiB/s < mean 10.08 KiB/s (SD = 2.72 KiB/s) < p9512.55 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 3.52 KiB/s < mean 7.57 KiB/s (SD = 2.12 KiB/s) < p959.41 KiB/s
Total bytes received
Total bytes received on primary network interface
count
1.48 MiB
mean
10.08 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
1.11 MiB
mean
7.57 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 109.47 MB/s

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

Critical Heavy swap usage (86.2% 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 24.55% < mean 32.32% (SD = 6.38%) < p95 45.52%
System
9.31%
CPU percentiles
CPU usage percentiles
p50
31.59%
p95
45.52%
p99
45.52%
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 61.78% < mean 63.82% (SD = 0.91%) < p95 64.29%
Memory available percentage
Percentage of available memory
p5 35.71% < mean 36.18% (SD = 0.91%) < p95 38.22%
Max host memory used
Maximum memory usage percentage across all hosts
max 63.82%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 86.16%
Memory growth rate
Rate of memory growth over time
growth 109.47MB/s
Disk read throughput
Disk read throughput in MB/s
0.00MB/s
Disk write throughput
Disk write throughput in MB/s
7.35MB/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
1.20
5 min
0.90
15 min
0.86
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 2.35% < mean 3.0611% (SD = 0.928%) < p95 4.9733%
60 second average
2.7972%
300 second average
2.2431%
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 3.19% < mean 5.07% (SD = 1.1597%) < p95 7.0467%
60 second average
4.2672%
300 second average
2.4164%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 2.6% < mean 4.1911% (SD = 1.0762%) < p95 6.2033%
60 second average
3.5467%
300 second average
2.0042%
Holochain process CPU usage
CPU usage by Holochain process
p5 0% < mean 19.56% (SD = 9.93%) < p95 33.68%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 88.35 KiB < mean 204.36 KiB (SD = 51.89 KiB) < p95228.71 KiB
Holochain process threads
Number of threads in Holochain process
p5 5 threads < mean 11.61 threads (SD = 2.96 threads) < p95 13 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 24.5 file descriptors < mean 50.36 file descriptors (SD = 11.87 file descriptors) < p95 60 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
Tue, 24 Mar 2026 17:35:33 UTC
Peer count
3
Peer count at end
3
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_23502164148
Session accepted -- timing
The duration of the session from acceptance to completion.
Mean
mean 0.52653s (SD = 0.414805s)
Max
Highest per-partition mean latency
max mean 0.650078s
Min
Lowest per-partition mean latency
min mean 0.402982s
Session accepted -- success rate
The number of accepted sessions that completed per second.
Mean
mean 7.61/s
Max
Highest per-partition mean rate
max 7.76/s
Min
Lowest per-partition mean rate
min 7.46/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 0.671904s (SD = 0.911455s)
Max
Highest per-partition mean latency
max mean 0.671904s
Min
Lowest per-partition mean latency
min mean 0.671904s
Session initiated -- success rate
The number of initiated sessions that completed per second.
Mean
mean 14.37/s
Max
Highest per-partition mean rate
max 14.37/s
Min
Lowest per-partition mean rate
min 14.37/s
Session initiated -- success ratio
Fraction of initiated sessions that completed successfully (0–1).
0.9796
Session initiated -- failures
Initiated sessions that failed to complete.
Total
7
Agents affected
1 / 1
Mean per agent
Total count divided by number of partitions, rounded to nearest whole number
7
Max
Highest count in any single partition
7
Min
Lowest count in any single partition
7
Host Metrics
User CPU usage
CPU usage by user space
9.36%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 29.52 KiB/s < mean 74.08 KiB/s (SD = 27.78 KiB/s) < p95116.35 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 30.27 KiB/s < mean 72.13 KiB/s (SD = 26.80 KiB/s) < p95113.51 KiB/s
Total bytes received
Total bytes received on primary network interface
count
65.11 MiB
mean
222.24 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
63.39 MiB
mean
216.38 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 38.41 MB/s

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

Critical Heavy swap usage (24.6% 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 5.52% < mean 12.78% (SD = 9.35%) < p95 25.39%
System
3.41%
CPU percentiles
CPU usage percentiles
p50
8.03%
p95
25.39%
p99
53.02%
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 6.42% < mean 20.81% (SD = 12.55%) < p95 37.52%
Memory available percentage
Percentage of available memory
p5 62.48% < mean 79.19% (SD = 12.55%) < p95 93.58%
Max host memory used
Maximum memory usage percentage across all hosts
max 37.17%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 24.62%
Memory growth rate
Rate of memory growth over time
growth 38.41MB/s
Disk read throughput
Disk read throughput in MB/s
0.00MB/s
Disk write throughput
Disk write throughput in MB/s
11.28MB/s
Disk space utilization risk
Number of hosts nearing disk space capacity by mount point
Mount Point /etc/hostname
0/2hosts
Mount Point /etc/hosts
0/2hosts
Mount Point /etc/resolv.conf
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
0.57
5 min
0.36
15 min
0.27
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 0.4811% < mean 0.7566% (SD = 0.3519%) < p95 1.8%
60 second average
0.6866%
300 second average
0.3848%
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 0.0475% < mean 0.1595% (SD = 0.0959%) < p95 0.3511%
60 second average
0.1291%
300 second average
0.0794%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0.0375% < mean 0.1401% (SD = 0.0926%) < p95 0.3311%
60 second average
0.1142%
300 second average
0.0697%
Holochain process CPU usage
CPU usage by Holochain process
p5 2.23% < mean 5.08% (SD = 3.04%) < p95 9.45%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 226.32 KiB < mean 248.18 KiB (SD = 16.46 KiB) < p95262.11 KiB
Holochain process threads
Number of threads in Holochain process
p5 15 threads < mean 24.45 threads (SD = 7.3 threads) < p95 36 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 68.33 file descriptors < mean 75.81 file descriptors (SD = 5.57 file descriptors) < p95 84.67 file descriptors

Validation Receipts

Creates an entry, wait for required validation receipts, then repeat. Records the amount of time it took to accumulate the required number of receipts for all DHT operations. This is measured to the nearest 20ms so that we don't keep the agent too busy checking for receipts.

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.

By default, this scenario will wait for a complete set of validation receipts before committing the next record. If the NO_VALIDATION_COMPLETE environment variable is set, it will instead publish new records on every round, building up an ever-growing list of action hashes to check on.

Started
Tue, 24 Mar 2026 17:31:28 UTC
Peer count
20
Peer count at end
343
Behaviours
  • default (1 agent)
Holochain version
0.6.1-rc.3
Wind Tunnel version
0.6.0
Run ID
validation_receipts_23502164148
Receipts complete timing
The amount of time between publishing a record and receiving the required number of validation receipts.
Mean
mean 5.572005s (SD = 2.166427s)
Max
Highest per-partition mean latency
max mean 6.205325s
Min
Lowest per-partition mean latency
min mean 5.275541s
Receipts complete rate
The number of complete validation receipt sets collected per second.
Mean
mean 1.82/s
Max
Highest per-partition mean rate
max 1.89/s
Min
Lowest per-partition mean rate
min 1.74/s
Host Metrics
User CPU usage
CPU usage by user space
8.61%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 15.25 KiB/s < mean 124.27 KiB/s (SD = 359.05 KiB/s) < p95525.98 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 15.19 KiB/s < mean 57.07 KiB/s (SD = 112.51 KiB/s) < p95127.14 KiB/s
Total bytes received
Total bytes received on primary network interface
count
1.47 GiB
mean
2.18 MiB/s
Total bytes sent
Total bytes sent on primary network interface
count
692.23 MiB
mean
1.00 MiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 536.75 MB/s

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

Critical Heavy swap usage (86.2% 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 2.55% < mean 11.92% (SD = 13.01%) < p95 41.07%
System
3.31%
CPU percentiles
CPU usage percentiles
p50
6.84%
p95
41.07%
p99
83.11%
CPU usage above 80%
Number of hosts above 80% CPU and mean time spent above threshold for those hosts
count
1 hosts
mean time
0.21s
Memory used percentage
Percentage of memory used
p5 8.39% < mean 27.91% (SD = 19.03%) < p95 77.82%
Memory available percentage
Percentage of available memory
p5 22.18% < mean 72.09% (SD = 19.03%) < p95 91.61%
Max host memory used
Maximum memory usage percentage across all hosts
max 77.91%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 86.21%
Memory growth rate
Rate of memory growth over time
growth 536.75MB/s
Disk read throughput
Disk read throughput in MB/s
0.26MB/s
Disk write throughput
Disk write throughput in MB/s
105.23MB/s
Disk space utilization risk
Number of hosts nearing disk space capacity by mount point
Mount Point /
0/5hosts
Mount Point /boot
0/1hosts
Mount Point /efi-boot
0/4hosts
Mount Point /etc/hostname
0/12hosts
Mount Point /etc/hosts
0/12hosts
Mount Point /etc/resolv.conf
0/12hosts
Mount Point /nix/store
0/5hosts
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
0.74
5 min
0.51
15 min
0.38
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 0.4524% < mean 0.8918% (SD = 0.2824%) < p95 1.3861%
60 second average
0.8307%
300 second average
0.6184%
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 2.3592% < mean 4.7658% (SD = 2.1085%) < p95 7.6006%
60 second average
4.2609%
300 second average
3.0201%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 2.1345% < mean 4.3777% (SD = 1.7044%) < p95 6.2722%
60 second average
3.9551%
300 second average
2.8034%
Holochain process CPU usage
CPU usage by Holochain process
p5 0% < mean 5.59% (SD = 7.25%) < p95 18.84%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 223.36 KiB < mean 248.36 KiB (SD = 24.83 KiB) < p95273.28 KiB
Holochain process threads
Number of threads in Holochain process
p5 1 threads < mean 22.98 threads (SD = 10.24 threads) < p95 35 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 0 file descriptors < mean 69.06 file descriptors (SD = 27.07 file descriptors) < p95 97 file descriptors

Write/Query

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

Started
Tue, 24 Mar 2026 17:16:43 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
write_query_23502164148
Write timing
The time it takes to complete the zome function call that writes the entry.
mean 0.042026s (SD = 0.011087s) p50 0.041623s p95 0.061104s p99 0.080446s
Write rate
The number of writes completed per second.
mean 75.5/s
Query timing
The time it takes to complete the chain_query_count_len zome call that queries the source chain.
mean 0.08074s (SD = 0.037272s) p50 0.079546s p95 0.138309s p99 0.152184s
Query rate
The number of chain queries completed per second.
mean 75.5/s
Error count
The number of errors accumulated during the run.
0
Host Metrics
User CPU usage
CPU usage by user space
39.46%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 645 B/s < mean 1.15 KiB/s (SD = 561 B/s) < p952.21 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 404 B/s < mean 783 B/s (SD = 413 B/s) < p951.55 KiB/s
Total bytes received
Total bytes received on primary network interface
count
172.45 KiB
mean
1.15 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
114.68 KiB
mean
783 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 46.1% < mean 50.26% (SD = 5.49%) < p95 60.9%
System
10.80%
CPU percentiles
CPU usage percentiles
p50
48.77%
p95
60.90%
p99
60.90%
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 47.05% < mean 48.08% (SD = 0.51%) < p95 48.73%
Memory available percentage
Percentage of available memory
p5 51.27% < mean 51.92% (SD = 0.51%) < p95 52.95%
Max host memory used
Maximum memory usage percentage across all hosts
max 48.08%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 1.01%
Memory growth rate
Rate of memory growth over time
growth -1.94MB/s
Disk read throughput
Disk read throughput in MB/s
0.27MB/s
Disk write throughput
Disk write throughput in MB/s
20.54MB/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
1.54
5 min
0.82
15 min
1.19
CPU overloaded hosts
Percentage of hosts that experienced CPU overload
0.00%
Holochain process CPU usage
CPU usage by Holochain process
p5 0% ≤ mean 0% (SD = 0%) ≤ p95 0%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 192.40 KiB < mean 230.77 KiB (SD = 23.78 KiB) < p95274.14 KiB
Holochain process threads
Number of threads in Holochain process
p5 1 threads ≤ mean 1 threads (SD = 0 threads) ≤ p95 1 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 0 file descriptors ≤ mean 0 file descriptors (SD = 0 file descriptors) ≤ p95 0 file descriptors

Write/Read

Creates an entry and reads it back, then repeats.

Started
Tue, 24 Mar 2026 17:18:58 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_23502164148
Write timing
The time taken to write the entry.
mean 0.018436s (SD = 0.008255s) p50 0.017176s p95 0.033224s p99 0.039173s
Write rate
The number of writes completed per second.
mean 234.25/s
Read timing
The time taken to read the entry.
mean 0.021458s (SD = 0.01365s) p50 0.019006s p95 0.049341s p99 0.058315s
Read rate
The number of reads completed per second.
mean 234.17/s
Error count
The number of errors accumulated over the run.
0
Host Metrics
User CPU usage
CPU usage by user space
43.79%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 21.61 KiB/s < mean 45.74 KiB/s (SD = 23.36 KiB/s) < p9573.43 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 23.92 KiB/s < mean 48.27 KiB/s (SD = 23.97 KiB/s) < p9578.64 KiB/s
Total bytes received
Total bytes received on primary network interface
count
5.36 MiB
mean
45.74 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
5.66 MiB
mean
48.27 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
Detected

Critical Heavy swap usage (24.6% 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 40.62% < mean 50.16% (SD = 4.91%) < p95 53.85%
System
6.37%
CPU percentiles
CPU usage percentiles
p50
52.55%
p95
53.85%
p99
53.85%
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 31.6% < mean 32.8% (SD = 0.64%) < p95 33.42%
Memory available percentage
Percentage of available memory
p5 66.58% < mean 67.2% (SD = 0.64%) < p95 68.4%
Max host memory used
Maximum memory usage percentage across all hosts
max 32.80%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 24.62%
Memory growth rate
Rate of memory growth over time
growth -57.21MB/s
Disk read throughput
Disk read throughput in MB/s
0.00MB/s
Disk write throughput
Disk write throughput in MB/s
20.33MB/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
1.71
5 min
0.84
15 min
0.60
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 0.8133% < mean 1.726% (SD = 0.6955%) < p95 2.6067%
60 second average
1.2607%
300 second average
0.4400%
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 0.028% (SD = 0.0527%) < p95 0.1333%
60 second average
0.0167%
300 second average
0.0007%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 0.028% (SD = 0.0527%) < p95 0.1333%
60 second average
0.0167%
300 second average
0.0007%
Holochain process CPU usage
CPU usage by Holochain process
p5 24.54% < mean 43.85% (SD = 9.78%) < p95 50.1%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 241.82 KiB < mean 246.19 KiB (SD = 2.66 KiB) < p95249.97 KiB
Holochain process threads
Number of threads in Holochain process
p5 9.67 threads < mean 13 threads (SD = 1.69 threads) < p95 14 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 44 file descriptors < mean 58.93 file descriptors (SD = 8.02 file descriptors) < p95 68 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
Tue, 24 Mar 2026 17:21:23 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_23502164148
Write timing
The time it takes to complete the zome function call that writes the entry, updates it, and links to the update.
mean 0.086293s (SD = 0.231594s) p50 0.026735s p95 0.411155s p99 1.084426s
Write rate
The number of write zome function calls that complete per second.
mean 37.45/s
Read timing
The time it takes to complete the zome function call that reads the data.
mean 0.162828s (SD = 0.339395s) p50 0.05204s p95 0.698979s p99 2.032757s
Read rate
The number of read zome function calls that complete per second.
mean 37.45/s
Error count
The number of errors accumulated over the run.
0
Host Metrics
User CPU usage
CPU usage by user space
26.30%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 12.64 KiB/s < mean 658.57 KiB/s (SD = 1.09 MiB/s) < p952.53 MiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 10.74 KiB/s < mean 27.56 KiB/s (SD = 27.35 KiB/s) < p9574.90 KiB/s
Total bytes received
Total bytes received on primary network interface
count
77.18 MiB
mean
658.57 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
3.23 MiB
mean
27.56 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 311.08 MB/s

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

Critical Heavy swap usage (86.2% 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 25.86% < mean 34.1% (SD = 9.59%) < p95 52.65%
System
7.81%
CPU percentiles
CPU usage percentiles
p50
31.45%
p95
52.65%
p99
52.65%
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 63.24% < mean 66.74% (SD = 1.77%) < p95 68.18%
Memory available percentage
Percentage of available memory
p5 31.82% < mean 33.26% (SD = 1.77%) < p95 36.76%
Max host memory used
Maximum memory usage percentage across all hosts
max 66.74%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 86.16%
Memory growth rate
Rate of memory growth over time
growth 311.08MB/s
Disk read throughput
Disk read throughput in MB/s
0.00MB/s
Disk write throughput
Disk write throughput in MB/s
15.61MB/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
2.11
5 min
1.25
15 min
1.00
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 4.06% < mean 4.6427% (SD = 0.7353%) < p95 6.0833%
60 second average
3.5193%
300 second average
2.4727%
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 7.0367% < mean 21.8293% (SD = 8.4213%) < p95 29.7367%
60 second average
13.8700%
300 second average
5.9627%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 5.65% < mean 17.934% (SD = 6.8698%) < p95 24.62%
60 second average
11.5180%
300 second average
4.9720%
Holochain process CPU usage
CPU usage by Holochain process
p5 13.7% < mean 19.94% (SD = 7.3%) < p95 33.7%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 316.10 KiB < mean 439.84 KiB (SD = 61.87 KiB) < p95471.71 KiB
Holochain process threads
Number of threads in Holochain process
p5 10 threads < mean 13.47 threads (SD = 1.88 threads) < p95 15 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 37.33 file descriptors < mean 62 file descriptors (SD = 12.79 file descriptors) < p95 74 file descriptors

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
Tue, 24 Mar 2026 17:23:35 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_23502164148
Call timing
The time taken for the call to complete.
mean 0.003704s (SD = 0.024843s) p50 0.002764s p95 0.003454s p99 0.006244s
Call rate
The number of zome calls completed per second.
mean 2708.17/s
Error count
The number of errors accumulated during the run.
0
Host Metrics
User CPU usage
CPU usage by user space
22.72%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 14.26 KiB/s < mean 288.39 KiB/s (SD = 358.86 KiB/s) < p95911.17 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 11.59 KiB/s < mean 20.39 KiB/s (SD = 7.73 KiB/s) < p9529.82 KiB/s
Total bytes received
Total bytes received on primary network interface
count
42.24 MiB
mean
288.39 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
2.99 MiB
mean
20.39 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
Detected

Critical Heavy swap usage (86.2% 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 29.02% < mean 33.05% (SD = 4.43%) < p95 41.31%
System
10.32%
CPU percentiles
CPU usage percentiles
p50
32.03%
p95
41.31%
p99
41.31%
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 63.92% < mean 65.34% (SD = 1.68%) < p95 68.99%
Memory available percentage
Percentage of available memory
p5 31.01% < mean 34.66% (SD = 1.68%) < p95 36.08%
Max host memory used
Maximum memory usage percentage across all hosts
max 65.34%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 86.17%
Memory growth rate
Rate of memory growth over time
growth -220.11MB/s
Disk read throughput
Disk read throughput in MB/s
0.00MB/s
Disk write throughput
Disk write throughput in MB/s
9.12MB/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
2.16
5 min
1.63
15 min
1.19
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 2.8333% < mean 4.5722% (SD = 2.0712%) < p95 8.42%
60 second average
4.4719%
300 second average
3.3103%
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 6.9767% < mean 16.1714% (SD = 10.2128%) < p95 35.06%
60 second average
17.9711%
300 second average
11.1958%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 5.75% < mean 12.4339% (SD = 7.1507%) < p95 25.98%
60 second average
14.1875%
300 second average
9.0061%
Holochain process CPU usage
CPU usage by Holochain process
p5 18.16% < mean 20.36% (SD = 2.06%) < p95 23.99%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 239.10 KiB < mean 278.49 KiB (SD = 86.35 KiB) < p95471.58 KiB
Holochain process threads
Number of threads in Holochain process
p5 12 threads < mean 12.72 threads (SD = 1.13 threads) < p95 15 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 51 file descriptors < mean 61.11 file descriptors (SD = 10.12 file descriptors) < p95 74 file descriptors