Hetzner Web Run Tests
CPX31 - Nov 04 2022

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Web Run tests are made of a load test tool and a database intensive Rails web application.

The load test tool sends HTTP requests to the web application at a controlled rate and records HTTP response codes, response latencies and timeouts. The load test tool is multithreaded and runs on the same VPS where the web application runs.

The intent is to measure:

  • the response times (latency) of the web server
  • the amount of CPU used to serve those requests under various load levels
  • what's the maximum load at which 100% requests are served without timing out.

Provider: Hetzner
Plan: CPX31
Datacenter: Virginia, USA
Number of CPU cores: 4
CPU type: AMD EPYC Processor

Web Runs by request rate


Note: the P99 is the 99th percentile. The P99 latency is the latency of the 1% slowest HTTP requests in the web run.


Rate (reqs/s) Average Latency P99 Latency CPU idle CPU steal Successful requests Timed out requests Duration (minutes)
1 59ms 150ms 98% 0.00% 304 0 5
5 53ms 150ms 92% 0.00% 1504 0 5
10 52ms 145ms 84% 0.00% 6004 0 10
15 51ms 145ms 78% 0.00% 4504 0 5
30 52ms 150ms 43% 0.00% 9014 0 5
45 51ms 145ms 28% 0.00% 13519 0 5
60 50ms 145ms 20% 0.00% 18026 0 5
70 51ms 145ms 5% 0.00% 21031 0 5
80 51ms 150ms 2% 0.00% 21887 2113 5

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