也被簡稱為 ab,
主要拿來測試 server 的執行效能(壓力測試)
安裝
sudo apt-get install apache2-utils查看安裝版本
ab -V查看指令說明
ab --help範例
ab -n 10 -c 2 http://www.xxxxxx.com/總共發出 10 個 request (2 個使用者同時進行)
-n requests 代表 Number of requests to perform
-c concurrency 代表 Number of multiple requests to make at a time
輸出結果
Server Software: nginx/1.21.6
Server Hostname: xxxx
Server Port: 80
Document Path: /
Document Length: 84 bytes
Concurrency Level: 2 //並行數
Time taken for tests: 0.041 seconds //測試的時間
Complete requests: 10 //完成的請求
Failed requests: 0 //失敗的請求
Total transferred: 4030 bytes //全部的網路傳輸量
HTML transferred: 840 bytes //html 網路傳輸量
Requests per second: 241.13 [#/sec] (mean) //吞吐率 throughput (Requests per second), 平均每秒處理 request 數量
Time per request: 8.294 [ms] (mean) //使用者平均等待時間
Time per request: 4.147 [ms] (mean, across all concurrent requests) // Time per request // Concurrency Level
Transfer rate: 94.90 [Kbytes/sec] received // 平均每秒網路流量
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.1 0 0
Processing: 5 7 1.6 6 10
Waiting: 5 6 1.6 6 10
Total: 5 7 1.6 6 10
Percentage of the requests served within a certain time (ms)
50% 6
66% 6
75% 8
80% 8
90% 10
95% 10
98% 10
99% 10
100% 10 (longest request)
// 請求分佈的時間, 像是 90% 的請求在 10ms 處理完畢.