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ローカルPCから手軽に並列リクエストする【Apache Benchmark】

に公開
Apache
tech

やりたいこと

  • APIサーバに数十オーダーの軽めの負荷をかけ、レスポンスタイムを確認したい
  • 厳密さは求めない
  • 無料でやりたい

結論: Apache Benchmarkを使う

https://httpd.apache.org/docs/2.4/programs/ab.html

# GETリクエスト
ab -n 9 -c 3 https://httpbin.org/get

# POSTリクエスト
echo '{"message":"Hello"}' | ab -n 9 -c 3 -p /dev/stdin -T 'application/json' https://httpbin.org/post
  • -n 9: 全9回リクエスト
  • -c 3: 3並列リクエスト
  • -p /dev/stdin: POSTのボディを/dev/stdinから読み込む
  • -T 'application/json': Content-Type: application/jsonを指定

環境を汚したくない人向け (ephemeralなコンテナから実行)

docker run --rm -it httpd:alpine /bin/sh
ab -n 9 -c 3 https://httpbin.org/get

結果例

/usr/local/apache2 # ab -n 9 -c 3 https://httpbin.org/get
This is ApacheBench, Version 2.3 <$Revision: 1923142 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking httpbin.org (be patient).....done


Server Software:        gunicorn/19.9.0
Server Hostname:        httpbin.org
Server Port:            443
SSL/TLS Protocol:       TLSv1.2,ECDHE-RSA-AES128-GCM-SHA256,2048,128
Server Temp Key:        ECDH prime256v1 256 bits
TLS Server Name:        httpbin.org

Document Path:          /get
Document Length:        259 bytes

Concurrency Level:      3
Time taken for tests:   5.733 seconds
Complete requests:      9
Failed requests:        0
Total transferred:      4356 bytes
HTML transferred:       2331 bytes
Requests per second:    1.57 [#/sec] (mean)
Time per request:       1911.036 [ms] (mean)
Time per request:       637.012 [ms] (mean, across all concurrent requests)
Transfer rate:          0.74 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:      600  686  77.6    725     818
Processing:   206  497 310.8    452    1025
Waiting:      206  496 310.7    451    1024
Total:        806 1183 351.3   1126    1843

Percentage of the requests served within a certain time (ms)
  50%   1025
  66%   1227
  75%   1227
  80%   1639
  90%   1843
  95%   1843
  98%   1843
  99%   1843
 100%   1843 (longest request)

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