PHP-FPM高载荷技巧 (PHP-FPM on highload tips)
PHP-FPM高负载技巧 (PHP-FPM on highload tips)
原文地址:http://hi.baidu.com/pibuchou/blog/item/7cbccff0a3b77dc60b46e024.html
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导致nginx 502 bad gateway的PHP-CGI(FASTCGI)
NGINX频爆502 BAD GATEWAY的错误,看了网上的教程,仍没有彻底解决。
目前我总结的解决502 BAD GATEWAY的方式有:
1.视服务器的性能,在php-fmp.conf里增加max_children的值,我目前用的15.
2.用reload参数定时重载php-fpm。这个主要原因是php脚本执行时间过长造成的,重载php-fpm能杜绝这个问题。如何彻底解决php-cgi脚本占用大量内存从而导致502错误的产生还值得进一步探讨,目前该做法不失为一种好办法。
具体的做法是,用crontab让php-fpm平滑重启,从而不影响PHP脚本的运行。
*/10 * * * * /usr/local/php/sbin/php-fpm reload
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When you running a highload website with?PHP-FPM?via FastCGI, the following tips may be useful to you : )
如果您高负载网站使用PHP-FPM管理FastCGI,这些技巧也许对您有用:)
1. Compile PHP’s modules as less as possible, the simple the best (fast);
1.尽量少安装PHP模块,最简单是最好(快)的
2. Increas PHP FastCGI child number to 100 and even more. Sometime, 200 is OK! ( On 4GB memory server);
2.把您的PHP FastCGI子进程数调到100或以上,在4G内存的服务器上200就可以
注:我的1g测试机,开64个是最好的,建议使用压力测试获取最佳值
3. Using SOCKET PHP FastCGI, and put into /dev/shm on Linux;
3.使用socket连接FastCGI,linux操作系统可以放在 /dev/shm中
注:在php-fpm.cnf里设置
4. Increase Linux “max open files”, using the following command (must be root):
# echo ‘ulimit -HSn 65536′ >> /etc/profile
# echo ‘ulimit -HSn 65536 >> /etc/rc.local
# source /etc/profile?
4.调高linux内核打开文件数量,可以使用这些命令(必须是root帐号)
echo ‘ulimit -HSn 65536′ >> /etc/profile
echo ‘ulimit -HSn 65536′ >> /etc/rc.local
source /etc/profile?
注:我是修改/etc/rc.local,加入ulimit -SHn 51200的
5. Increase?PHP-FPM?open file description rlimit:
# vi /path/to/php-fpm.conf
Find “
Change 1024 to 4096 or higher number.
Restart?PHP-FPM.
5. 增加?PHP-FPM?打开文件描述符的限制:
# vi /path/to/php-fpm.conf
找到“
把1024 更改为 4096 或者更高.
重启?PHP-FPM.
6. Using PHP code accelerator, e.g eAccelerator, XCache. And set “cache_dir” to /dev/shm on Linux.
6.使用php代码加速器,例如 eAccelerator, XCache.在linux平台上可以把`cache_dir`指向 /dev/shm
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