apache 的調優

[[email protected] ~]# ab -c 100 -n 1000 http://192.168.1.21/

//100個用戶端，通路了1000次

[[email protected] ~]# ab -c 1000 -n 10000 http://192.168.1.21/

Concurrency Level: 1000 //一千個客戶

Time taken for tests: 26.645 seconds //處理的時間

Complete requests: 10000 //通路的次數

Failed requests: 81 //失敗的次數

檢視浏覽器：

http://192.168.1.21/httpd-status

148 requests currently being processed, 0 idle workers //目前的通路量

[[email protected] ~]# ab -c 5000 -n 50000 http://192.168.1.21/

This is ApacheBench, Version 2.3 < Revision:1430300 R e v i s i o n : 1430300 >

Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/

Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 192.168.1.21 (be patient)

socket: Too many open files (24) //打開的檔案太多。是系統的原因

[[email protected] ~]# ulimit -SHn 65535 //把系統的通路量調大點

[[email protected] ~]# ab -c 5000 -n 50000 http://192.168.1.21/ //執行到一半就會失敗

檢視一下記憶體和cpu

uptime free -m

解決方法：

修改apache的線程：

[[email protected] ~]# cd /etc/httpd/conf.modules.d/

[[email protected] conf.modules.d]# vim 00-mpm.conf

LoadModule mpm_prefork_module modules/mod_mpm_prefork.so

MaxClients 1024

[[email protected] conf.modules.d]# apachectl -t //文法檢測

AH00180: WARNING: MaxRequestWorkers of 1024 exceeds ServerLimit value of

256 servers, decreasing MaxRequestWorkers to 256.

To increase, please see the ServerLimit directive.

Syntax OK

[[email protected] conf.modules.d]# vim 00-mpm.conf

LoadModule mpm_prefork_module modules/mod_mpm_prefork.so

MaxClients 1024

ServerLimit 1024

[[email protected] conf.modules.d]# apachectl -t

Syntax OK

[[email protected] conf.modules.d]# apachectl graceful //重起服務

[[email protected] conf.modules.d]# pstree -p

[[email protected] httpd]# grep -Ri keepalive . //了解