Amazon EC2 Web Run Tests
c5.large - Jul 26 2020

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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: Amazon EC2
Plan: c5.large
Datacenter: Virginia, USA
Number of CPU cores: 2
CPU type: Intel(R) Xeon(R) Platinum 8124M CPU @ 3.00GHz

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 53ms 120ms 97% 0.03% 304 0 5
5 47ms 105ms 86% 0.03% 1504 0 5
10 65ms 135ms 65% 0.03% 6003 1 10
15 61ms 130ms 50% 0.03% 4504 0 5
25 67ms 150ms 11% 0.02% 7509 0 5
30 67ms 155ms 0% 0.02% 8401 599 5

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