壓測工具ab

 

 

一、安裝ab
yum install httpd-tools

 

二、使用
ab -n 2000 -c 2 http://www.cctv.com
-n：總的請求數
-c：併發數
-k：是否開啓長鏈接

 

三、結果舉例：
Concurrency Level: 20 ====>併發數
Time taken for tests: 37.252 seconds =====>總共的時間
Complete requests: 2000 ====>總請求數
Failed requests: 0
Write errors: 0
Total transferred: 637985160 bytes
HTML transferred: 637254000 bytes
Requests per second: 53.69 [#/sec] (mean) ====>服務端平均處理速率（即：總的請求數/總共的時間）
Time per request: 372.516 [ms] (mean) ===>在客戶端處理單個請求所須要花費的時間
Time per request: 18.626 [ms] (mean, across all concurrent requests) ===>在服務端處理單個請求所須要花費的時間（不包含網絡傳輸時間）
Transfer rate: 16724.98 [Kbytes/sec] received ====>網絡傳輸帶寬佔用狀況

Connection Times (ms)
min mean[+/-sd] median max
Connect: 5 42 212.1 26 3037
Processing: 23 329 89.5 321 799
Waiting: 4 32 28.5 28 348
Total: 29 371 231.2 348 3432