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
Wed, 25 Mar 2026 15:09:25 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_23547113976
First install time
The time from conductor startup to completion of the first app installation attempt.
0.357375117s
Install app timing
The time taken to install an app.
mean 0.063301s (SD = 0.006125s) p50 0.062139s p95 0.071733s p99 0.087538s
Host Metrics
User CPU usage
CPU usage by user space
29.68%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 122.05 KiB/s < mean 325.85 KiB/s (SD = 196.29 KiB/s) < p95717.21 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 51.66 KiB/s < mean 212.41 KiB/s (SD = 131.35 KiB/s) < p95477.86 KiB/s
Total bytes received
Total bytes received on primary network interface
count
95.46 MiB
mean
325.85 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
62.23 MiB
mean
212.41 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 1646.47 MB/s

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

Critical Heavy swap usage (43.1% 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 33.17% < mean 37.02% (SD = 4.33%) < p95 42.16%
System
7.35%
CPU percentiles
CPU usage percentiles
p50
36.01%
p95
42.16%
p99
55.95%
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 34.45% < mean 50.78% (SD = 7.47%) < p95 56.61%
Memory available percentage
Percentage of available memory
p5 43.39% < mean 49.22% (SD = 7.47%) < p95 65.55%
Max host memory used
Maximum memory usage percentage across all hosts
max 50.78%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 43.09%
Memory growth rate
Rate of memory growth over time
growth 1646.47MB/s
Disk read throughput
Disk read throughput in MB/s
0.83MB/s
Disk write throughput
Disk write throughput in MB/s
26.55MB/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
1.62
5 min
0.92
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 2.2% < mean 3.7187% (SD = 0.9687%) < p95 5.12%
60 second average
3.0468%
300 second average
1.4177%
Memory pressure some
Memory pressure (some tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% < mean 0.0039% (SD = 0.0166%) < p95 0.03%
60 second average
0.0013%
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 0.0039% (SD = 0.0166%) < p95 0.03%
60 second average
0.0013%
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 0.0642% (SD = 0.0979%) < p95 0.32%
60 second average
0.0439%
300 second average
0.0052%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 0.0239% (SD = 0.0484%) < p95 0.18%
60 second average
0.0123%
300 second average
0.0000%
Holochain process CPU usage
CPU usage by Holochain process
p5 28.84% ≤ mean 28.43% (SD = 5.28%) < p95 29.65%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 464.87 KiB < mean 1.59 MiB (SD = 516.99 KiB) < p951.99 MiB
Holochain process threads
Number of threads in Holochain process
p5 16 threads < mean 18.23 threads (SD = 3.2 threads) < p95 19 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 116 file descriptors < mean 1750.29 file descriptors (SD = 584.06 file descriptors) < p95 2124 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
Wed, 25 Mar 2026 15:07:15 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_23547113976
First install time
The time from conductor startup to completion of the first app installation attempt.
1.416914313s
Install app timing
The time taken to install an app.
mean 0.527849s (SD = 0.362062s) p50 0.345025s p95 1.195059s p99 1.576192s
Host Metrics
User CPU usage
CPU usage by user space
14.92%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 6.05 KiB/s < mean 23.89 KiB/s (SD = 7.76 KiB/s) < p9532.21 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 3.80 KiB/s < mean 7.81 KiB/s (SD = 1.58 KiB/s) < p959.37 KiB/s
Total bytes received
Total bytes received on primary network interface
count
2.10 MiB
mean
23.89 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
703.34 KiB
mean
7.81 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 824.46 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 9.32% < mean 17.21% (SD = 15.52%) < p95 60.26%
System
2.29%
CPU percentiles
CPU usage percentiles
p50
11.17%
p95
60.26%
p99
60.26%
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 8.24% < mean 15.11% (SD = 3.14%) < p95 19.18%
Memory available percentage
Percentage of available memory
p5 80.82% < mean 84.89% (SD = 3.14%) < p95 91.76%
Max host memory used
Maximum memory usage percentage across all hosts
max 15.11%
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 824.46MB/s
Disk read throughput
Disk read throughput in MB/s
0.00MB/s
Disk write throughput
Disk write throughput in MB/s
4.75MB/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
1.58
5 min
0.54
15 min
0.24
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 0.1% < mean 0.167% (SD = 0.0488%) < p95 0.27%
60 second average
0.1140%
300 second average
0.1470%
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 9.25% < mean 26.037% (SD = 9.9471%) < p95 36.2%
60 second average
14.3590%
300 second average
5.0740%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 8.92% < mean 25.771% (SD = 9.9939%) < p95 36.08%
60 second average
14.1820%
300 second average
5.0080%
Holochain process CPU usage
CPU usage by Holochain process
p5 8.39% < mean 10.94% (SD = 3.16%) < p95 19.02%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 228.48 KiB < mean 615.80 KiB (SD = 192.89 KiB) < p95875.16 KiB
Holochain process threads
Number of threads in Holochain process
p5 16 threads < mean 19.67 threads (SD = 1.49 threads) < p95 21 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 69 file descriptors < mean 449.89 file descriptors (SD = 211.85 file descriptors) < p95 699 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
Wed, 25 Mar 2026 14:47:53 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_23547113976
Zome call timing
The time elapsed between start of install and calling init.
mean 0.008998s (SD = 0s) p50 0.008998s p95 0.008998s p99 0.008998s
Not enough time data to show a trend.
Host Metrics
User CPU usage
CPU usage by user space
41.72%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 45 B/s < mean 178.31 KiB/s (SD = 953.85 KiB/s) ≤ p954.38 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 30 B/s < mean 5.25 KiB/s (SD = 26.26 KiB/s) ≤ p951.09 KiB/s
Total bytes received
Total bytes received on primary network interface
count
52.24 MiB
mean
178.31 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
1.54 MiB
mean
5.25 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 12.51 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 60.81% < mean 60.86% (SD = 4.89%) < p95 61.3%
System
19.14%
CPU percentiles
CPU usage percentiles
p50
61.13%
p95
61.30%
p99
76.23%
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 11.78% < mean 11.89% (SD = 0.59%) < p95 12.29%
Memory available percentage
Percentage of available memory
p5 87.71% < mean 88.11% (SD = 0.59%) < p95 88.22%
Max host memory used
Maximum memory usage percentage across all hosts
max 11.89%
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 12.51MB/s
Disk read throughput
Disk read throughput in MB/s
0.00MB/s
Disk write throughput
Disk write throughput in MB/s
4.58MB/s
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
1.70
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 2.14% < mean 30.3671% (SD = 8.5437%) < p95 33.96%
60 second average
24.9765%
300 second average
11.5390%
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 0.06% (SD = 0.1803%) < p95 0.6%
60 second average
0.0603%
300 second average
0.0303%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 0.0213% (SD = 0.0655%) < p95 0.24%
60 second average
0.0184%
300 second average
0.0029%
Holochain process CPU usage
CPU usage by Holochain process
p5 45.59% ≤ mean 44.93% (SD = 9.23%) < p95 45.81%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 249.19 KiB ≤ mean 246.61 KiB (SD = 23.73 KiB) < p95251.24 KiB
Holochain process threads
Number of threads in Holochain process
p5 12 threads ≤ mean 11.71 threads (SD = 1.99 threads) < p95 12 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 51 file descriptors < mean 53.74 file descriptors (SD = 12.44 file descriptors) < p95 72 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
Wed, 25 Mar 2026 14:50:13 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_23547113976
Send timing
The time taken to emit a batch of 10,000 signals.
mean 2.478541s (SD = 1.20181s) p50 2.523906s p95 4.256234s p99 4.256234s
Receive timing
The time taken to receive the completed batch, to the nearest 250ms.
mean 29.435604s (SD = 1.599729s) p50 30.001016s p95 30.001911s p99 30.001911s
Success ratio
The proportion of signals successfully received in a batch.
min 0.9086999893188475 < mean 0.9504 (SD = 0.0259) < max 0.979099988937378
Host Metrics
User CPU usage
CPU usage by user space
8.02%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 842 B/s < mean 154.16 KiB/s (SD = 822.20 KiB/s) ≤ p957.42 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 17 B/s < mean 3.31 KiB/s (SD = 16.03 KiB/s) < p954.42 KiB/s
Total bytes received
Total bytes received on primary network interface
count
45.17 MiB
mean
154.16 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
992.28 KiB
mean
3.31 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 9.22 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 8.31% < mean 16.5% (SD = 14.33%) < p95 36.59%
System
8.47%
CPU percentiles
CPU usage percentiles
p50
8.94%
p95
36.59%
p99
77.63%
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 20.3% < mean 20.4% (SD = 0.36%) < p95 20.55%
Memory available percentage
Percentage of available memory
p5 79.45% < mean 79.6% (SD = 0.36%) < p95 79.7%
Max host memory used
Maximum memory usage percentage across all hosts
max 20.40%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 0.03%
Memory growth rate
Rate of memory growth over time
growth 9.22MB/s
Disk read throughput
Disk read throughput in MB/s
0.00MB/s
Disk write throughput
Disk write throughput in MB/s
1.30MB/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
1.84
5 min
0.87
15 min
0.41
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 0.71% < mean 3.7045% (SD = 3.021%) < p95 11.27%
60 second average
2.9081%
300 second average
1.2903%
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 0.0084% (SD = 0.0332%) < p95 0.06%
60 second average
0.0071%
300 second average
0.0003%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 0.0032% (SD = 0.0145%) < p95 0.02%
60 second average
0.0023%
300 second average
0.0000%
Holochain process CPU usage
CPU usage by Holochain process
p5 0.55% < mean 3.66% (SD = 12.71%) < p95 15.51%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 244.61 KiB ≤ mean 242.77 KiB (SD = 17.12 KiB) < p95245.88 KiB
Holochain process threads
Number of threads in Holochain process
p5 7 threads < mean 11.61 threads (SD = 2.25 threads) < p95 12 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 11 file descriptors < mean 46.13 file descriptors (SD = 13.08 file descriptors) < p95 64 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
Wed, 25 Mar 2026 14:52:18 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_call_rate_23547113976
Dispatch timing
The time between sending a remote call and the remote handler being invoked.
Mean
mean -37.765886s (SD = 167.269813s)
Max
Highest per-partition mean latency
max mean 0s
Min
Lowest per-partition mean latency
min mean -42.921704s
Round-trip timing
The total elapsed time to get a response to the client.
Mean
mean 0.097325s (SD = 0.106931s)
Max
Highest per-partition mean latency
max mean 0.125149s
Min
Lowest per-partition mean latency
min mean 0.081747s
Host Metrics
User CPU usage
CPU usage by user space
6.01%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 10.90 KiB/s < mean 73.98 KiB/s (SD = 508.56 KiB/s) ≤ p9530.64 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 11.10 KiB/s < mean 16.34 KiB/s (SD = 8.63 KiB/s) < p9528.04 KiB/s
Total bytes received
Total bytes received on primary network interface
count
647.29 MiB
mean
728.38 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
142.95 MiB
mean
160.86 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
NotDetected
Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 311.10 MB/s

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

Critical Heavy swap usage (92.0% 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 2.8% < mean 9.55% (SD = 11.12%) < p95 47.97%
System
3.54%
CPU percentiles
CPU usage percentiles
p50
5.27%
p95
47.97%
p99
48.83%
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 5.69% < mean 23.64% (SD = 17.87%) < p95 64.75%
Memory available percentage
Percentage of available memory
p5 35.25% < mean 76.36% (SD = 17.87%) < p95 94.31%
Max host memory used
Maximum memory usage percentage across all hosts
max 64.73%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 92.04%
Memory growth rate
Rate of memory growth over time
growth 311.10MB/s
Disk read throughput
Disk read throughput in MB/s
0.01MB/s
Disk write throughput
Disk write throughput in MB/s
11.95MB/s
Disk space utilization risk
Number of hosts nearing disk space capacity by mount point
Mount Point /
0/5hosts
Mount Point /efi-boot
0/4hosts
Mount Point /etc/hostname
0/5hosts
Mount Point /etc/hosts
0/5hosts
Mount Point /etc/resolv.conf
0/5hosts
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
0.56
5 min
0.44
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 0.727% (SD = 1.6737%) < p95 4.42%
60 second average
0.6868%
300 second average
0.5137%
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 2.1927% (SD = 6.049%) < p95 8.74%
60 second average
2.1670%
300 second average
1.7515%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 1.9915% (SD = 5.5152%) < p95 8.01%
60 second average
1.9674%
300 second average
1.6040%
Holochain process CPU usage
CPU usage by Holochain process
p5 0% < mean 3.34% (SD = 3.86%) < p95 5.9%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 200.05 KiB < mean 217.41 KiB (SD = 19.71 KiB) < p95235.61 KiB
Holochain process threads
Number of threads in Holochain process
p5 1 threads < mean 17.68 threads (SD = 6.36 threads) < p95 23 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 0 file descriptors < mean 52.91 file descriptors (SD = 21.31 file descriptors) < p95 84 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
Wed, 25 Mar 2026 15:15:14 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_23547113976
Session accepted -- timing
The duration of the session from acceptance to completion.
Mean
mean 0.488555s (SD = 0.085942s)
Max
Highest per-partition mean latency
max mean 0.493956s
Min
Lowest per-partition mean latency
min mean 0.483154s
Session accepted -- success rate
The number of accepted sessions that completed per second.
Mean
mean 7.02/s
Max
Highest per-partition mean rate
max 7.04/s
Min
Lowest per-partition mean rate
min 7/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 0.722715s (SD = 0.343474s)
Max
Highest per-partition mean latency
max mean 0.722715s
Min
Lowest per-partition mean latency
min mean 0.722715s
Session initiated -- success rate
The number of initiated sessions that completed per second.
Mean
mean 14.04/s
Max
Highest per-partition mean rate
max 14.04/s
Min
Lowest per-partition mean rate
min 14.04/s
Session initiated -- success ratio
Fraction of initiated sessions that completed successfully (0–1).
1
Host Metrics
User CPU usage
CPU usage by user space
8.19%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 23.75 KiB/s < mean 94.26 KiB/s (SD = 355.41 KiB/s) < p95150.96 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 20.54 KiB/s < mean 43.73 KiB/s (SD = 19.52 KiB/s) < p9592.85 KiB/s
Total bytes received
Total bytes received on primary network interface
count
81.92 MiB
mean
279.63 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
38.01 MiB
mean
129.74 KiB/s
CPU spike anomaly
CPU spike anomaly was detected
Detected

Warning CPU p99 reached 91.0%

Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 31.22 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 2.19% < mean 11.58% (SD = 20.31%) < p95 77.34%
System
3.39%
CPU percentiles
CPU usage percentiles
p50
3.44%
p95
77.34%
p99
91.05%
CPU usage above 80%
Number of hosts above 80% CPU and mean time spent above threshold for those hosts
count
1 hosts
mean time
0.13s
Memory used percentage
Percentage of memory used
p5 5.79% < mean 9.96% (SD = 5.65%) < p95 22.06%
Memory available percentage
Percentage of available memory
p5 77.94% < mean 90.04% (SD = 5.65%) < p95 94.21%
Max host memory used
Maximum memory usage percentage across all hosts
max 17.67%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 0.05%
Memory growth rate
Rate of memory growth over time
growth 31.22MB/s
Disk read throughput
Disk read throughput in MB/s
0.01MB/s
Disk write throughput
Disk write throughput in MB/s
8.31MB/s
Disk space utilization risk
Number of hosts nearing disk space capacity by mount point
Mount Point /
0/2hosts
Mount Point /efi-boot
0/1hosts
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
0.93
5 min
0.81
15 min
0.42
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 3.8145% (SD = 10.2219%) < p95 34.05%
60 second average
4.7523%
300 second average
4.4873%
Memory pressure some
Memory pressure (some tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% < mean 0.0108% (SD = 0.0561%) < p95 0.06%
60 second average
0.0080%
300 second average
0.0011%
Memory pressure full
Memory pressure (all tasks stalled) over 10, 60, and 300 second averages
10 second average
p5 0% < mean 0.0018% (SD = 0.0131%) ≤ p95 0%
60 second average
0.0009%
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 0.3501% (SD = 1.1531%) < p95 2.68%
60 second average
0.5191%
300 second average
0.5584%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 0.1186% (SD = 0.4629%) < p95 0.62%
60 second average
0.2417%
300 second average
0.3134%
Holochain process CPU usage
CPU usage by Holochain process
p5 0% < mean 1.6% (SD = 2.06%) < p95 2.9%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 226.88 KiB < mean 246.39 KiB (SD = 26.01 KiB) < p95271.84 KiB
Holochain process threads
Number of threads in Holochain process
p5 1 threads < mean 11.76 threads (SD = 7.77 threads) < p95 18 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 0 file descriptors < mean 48.54 file descriptors (SD = 35.08 file descriptors) < p95 82 file descriptors

Write/Read

Creates an entry and reads it back, then repeats.

Started
Wed, 25 Mar 2026 15:00:42 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_23547113976
Write timing
The time taken to write the entry.
mean 0.027011s (SD = 0.029246s) p50 0.023405s p95 0.062484s p99 0.089031s
Write rate
The number of writes completed per second.
mean 157.69/s
Read timing
The time taken to read the entry.
mean 0.033949s (SD = 0.022577s) p50 0.028931s p95 0.076988s p99 0.087277s
Read rate
The number of reads completed per second.
mean 157.66/s
Error count
The number of errors accumulated over the run.
0
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 100 B/s < mean 58.49 KiB/s (SD = 311.19 KiB/s) ≤ p951.50 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 161 B/s < mean 1.70 KiB/s (SD = 6.78 KiB/s) ≤ p95860 B/s
Total bytes received
Total bytes received on primary network interface
count
17.14 MiB
mean
58.49 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
509.47 KiB
mean
1.70 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 13.36% < mean 15.91% (SD = 1.35%) < p95 17.07%
System
2.17%
CPU percentiles
CPU usage percentiles
p50
16.27%
p95
17.07%
p99
19.45%
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 24.91% < mean 25.26% (SD = 0.79%) < p95 26.17%
Memory available percentage
Percentage of available memory
p5 73.83% < mean 74.74% (SD = 0.79%) < p95 75.09%
Max host memory used
Maximum memory usage percentage across all hosts
max 25.26%
Max host swap used percentage
Maximum swap space usage percentage across all hosts
max 3.27%
Memory growth rate
Rate of memory growth over time
growth -33.66MB/s
Disk read throughput
Disk read throughput in MB/s
0.00MB/s
Disk write throughput
Disk write throughput in MB/s
13.52MB/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
1.55
5 min
0.71
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% (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 0.5497% (SD = 0.7978%) < p95 2.88%
60 second average
0.5455%
300 second average
0.2855%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 0% < mean 0.5348% (SD = 0.795%) < p95 2.88%
60 second average
0.5329%
300 second average
0.2771%
Holochain process CPU usage
CPU usage by Holochain process
p5 10.73% < mean 14.93% (SD = 3.05%) < p95 16.69%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 266.35 KiB < mean 277.65 KiB (SD = 4.50 KiB) < p95281.48 KiB
Holochain process threads
Number of threads in Holochain process
p5 21 threads < mean 21.26 threads (SD = 3.71 threads) < p95 22 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 61 file descriptors < mean 61.81 file descriptors (SD = 11.79 file descriptors) < p95 71 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
Wed, 25 Mar 2026 15:02:51 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_23547113976
Write timing
The time it takes to complete the zome function call that writes the entry, updates it, and links to the update.
mean 0.102428s (SD = 0.036641s) p50 0.094222s p95 0.174663s p99 0.211404s
Write rate
The number of write zome function calls that complete per second.
mean 34.71/s
Read timing
The time it takes to complete the zome function call that reads the data.
mean 0.181875s (SD = 0.048076s) p50 0.170258s p95 0.282765s p99 0.314358s
Read rate
The number of read zome function calls that complete per second.
mean 34.71/s
Error count
The number of errors accumulated over the run.
0
Host Metrics
User CPU usage
CPU usage by user space
47.12%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 768 B/s < mean 1.25 KiB/s (SD = 837 B/s) < p953.44 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 428 B/s < mean 783 B/s (SD = 462 B/s) < p952.35 KiB/s
Total bytes received
Total bytes received on primary network interface
count
375.39 KiB
mean
1.25 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
229.30 KiB
mean
783 B/s
CPU spike anomaly
CPU spike anomaly was detected
Detected

Warning CPU p99 reached 98.4%

Memory leak anomaly
Memory leak anomaly was detected
Detected

Warning Memory growing at 88.36 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 45.31% < mean 61.86% (SD = 11.38%) < p95 84.19%
System
14.74%
CPU percentiles
CPU usage percentiles
p50
61.11%
p95
84.19%
p99
98.40%
CPU usage above 80%
Number of hosts above 80% CPU and mean time spent above threshold for those hosts
count
1 hosts
mean time
0.10s
Memory used percentage
Percentage of memory used
p5 45.42% < mean 49.63% (SD = 1.56%) < p95 50.39%
Memory available percentage
Percentage of available memory
p5 49.61% < mean 50.37% (SD = 1.56%) < p95 54.58%
Max host memory used
Maximum memory usage percentage across all hosts
max 49.63%
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 88.36MB/s
Disk read throughput
Disk read throughput in MB/s
0.36MB/s
Disk write throughput
Disk write throughput in MB/s
27.79MB/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
2.25
5 min
1.30
15 min
0.79
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 154.33 KiB < mean 439.06 KiB (SD = 94.49 KiB) < p95476.46 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

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
Wed, 25 Mar 2026 15:05:12 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_23547113976
Call timing
The time taken for the call to complete.
mean 0.003589s (SD = 0.029379s) p50 0.002462s p95 0.002872s p99 0.006094s
Call rate
The number of zome calls completed per second.
mean 2761.07/s
Error count
The number of errors accumulated during the run.
0
Host Metrics
User CPU usage
CPU usage by user space
14.43%
Network receive rate (primary)
Rate of bytes received on primary network interface
p5 93 B/s < mean 93.07 KiB/s (SD = 469.13 KiB/s) ≤ p9517.45 KiB/s
Network send rate (primary)
Rate of bytes sent on primary network interface
p5 240 B/s < mean 10.55 KiB/s (SD = 16.23 KiB/s) < p9544.98 KiB/s
Total bytes received
Total bytes received on primary network interface
count
27.27 MiB
mean
93.07 KiB/s
Total bytes sent
Total bytes sent on primary network interface
count
3.09 MiB
mean
10.55 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 14.26% < mean 22.19% (SD = 6.88%) < p95 26.94%
System
7.77%
CPU percentiles
CPU usage percentiles
p50
22.13%
p95
26.94%
p99
52.17%
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 12.33% < mean 14.52% (SD = 1.64%) < p95 17.23%
Memory available percentage
Percentage of available memory
p5 82.77% < mean 85.48% (SD = 1.64%) < p95 87.67%
Max host memory used
Maximum memory usage percentage across all hosts
max 14.52%
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 -291.40MB/s
Disk read throughput
Disk read throughput in MB/s
0.00MB/s
Disk write throughput
Disk write throughput in MB/s
5.33MB/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
1.12
5 min
0.70
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 0.2335% (SD = 0.328%) < p95 0.81%
60 second average
0.2406%
300 second average
0.1577%
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 5.05% < mean 12.6548% (SD = 7.7877%) < p95 27.95%
60 second average
9.9094%
300 second average
5.4435%
I/O pressure full
I/O pressure (all tasks stalled) over 10, 60 and 300 second averages
10 second average
p5 4.53% < mean 12.189% (SD = 7.8034%) < p95 27.6%
60 second average
9.4642%
300 second average
5.1290%
Holochain process CPU usage
CPU usage by Holochain process
p5 9.97% < mean 17.55% (SD = 6.53%) < p95 20.57%
Holochain process memory (PSS)
Proportional Set Size memory of Holochain process
p5 1.49 KiB < mean 227.35 KiB (SD = 68.37 KiB) < p95249.70 KiB
Holochain process threads
Number of threads in Holochain process
p5 1 threads < mean 11.44 threads (SD = 3.37 threads) < p95 12 threads
Holochain process file descriptors
Number of file descriptors used by Holochain process
p5 8 file descriptors < mean 45.5 file descriptors (SD = 14.41 file descriptors) < p95 64 file descriptors