Amazon EC2 Web Run Tests
m5a.large - May 21 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: m5a.large
Datacenter: Virginia, USA
Number of CPU cores: 2
CPU type: AMD EPYC 7571

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 66ms 150ms 96% 0.00% 304 0 5
5 67ms 115ms 81% 0.00% 3003 1 5
10 83ms 135ms 56% 0.00% 6005 0 10
15 83ms 140ms 34% 0.00% 4505 0 5
20 90ms 155ms 6% 0.00% 6008 0 5
25 86ms 150ms 0% 0.00% 6619 881 5

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