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php-fpm服务挂掉

作者:用户 来源:互联网 时间:2017-11-30 15:31:14

php服务fpm

php-fpm服务挂掉 - 摘要: 本文讲的是php-fpm服务挂掉, 今天发了个链接,可能同时在线的人瞬间比较多,结果网站报503错误,回去打开php-fpm错误日志一看,php-fpm服务挂掉了,报如下错误: [04-Apr-2016 15:38:04] NOTICE: systemdmonitorint

今天发了个链接,可能同时在线的人瞬间比较多,结果网站报503错误,回去打开php-fpm错误日志一看,php-fpm服务挂掉了,报如下错误:


[04-Apr-2016 15:38:04] NOTICE: systemdmonitorintervalsetto 10000ms
[05-Apr-2016 19:03:08] WARNING: [poolwww] seemsbusy (youmayneedto increasepm.start_servers, or pm.min/max_spare_servers), spawning 8 children, thereare 0 idle, and 29 totalchildren
[05-Apr-2016 19:03:09] WARNING: [poolwww] seemsbusy (youmayneedto increasepm.start_servers, or pm.min/max_spare_servers), spawning 16 children, thereare 0 idle, and 34 totalchildren
[05-Apr-2016 19:03:11] WARNING: [poolwww] seemsbusy (youmayneedto increasepm.start_servers, or pm.min/max_spare_servers), spawning 32 children, thereare 0 idle, and 39 totalchildren
[05-Apr-2016 19:03:12] WARNING: [poolwww] seemsbusy (youmayneedto increasepm.start_servers, or pm.min/max_spare_servers), spawning 32 children, thereare 0 idle, and 44 totalchildren
[05-Apr-2016 19:03:13] WARNING: [poolwww] seemsbusy (youmayneedto increasepm.start_servers, or pm.min/max_spare_servers), spawning 32 children, thereare 0 idle, and 49 totalchildren
[05-Apr-2016 19:03:14] WARNING: [poolwww] serverreachedpm.max_children setting (50), considerraisingit

错误提示建议增加pm.start_servers数量,打开我的php-fpm配置:


pm.max_children = 50
; Thenumberofchild processescreatedonstartup.
; Note: Usedonlywhenpmis setto 'dynamic'
; Default Value: min_spare_servers + (max_spare_servers - min_spare_servers) / 2
pm.start_servers = 15
; Thedesiredminimumnumberofidleserverprocesses.
; Note: Usedonlywhenpmis setto 'dynamic'
; Note: Mandatorywhenpmis setto 'dynamic'
pm.min_spare_servers = 5
; Thedesiredmaximumnumberofidleserverprocesses.
; Note: Usedonlywhenpmis setto 'dynamic'
; Note: Mandatorywhenpmis setto 'dynamic'
pm.max_spare_servers = 35

这里pm.start_servers之前我设置为5,注意配置文件也说明start_servers的值默认是max_spare_servers-min_spare_servers的一半。(ps:具体的值要根据服务器配置情况和压力测试得出)


网站服务器是阿里云1G带宽,1G内存,1核CPU配置,关键还在一台机子上装了数据库,redis各种服务。


几个php-fpm重要参数说明
pm.max_children = 24

static模式下创建的子进程数或dynamic模式下同一时刻允许最大的php-fpm子进程数量


pm.start_servers = 16

动态方式下的起始php-fpm进程数量


pm.min_spare_servers = 12

动态方式下服务器空闲时最小php-fpm进程数量


pm.max_spare_servers = 24

动态方式下服务器空闲时最大php-fpm进程数量


经验人士的总结:


一般php-fpm进程占用20~30m左右的内存就按30m算。如果单独跑php-fpm,动态方式起始值可设置物理内存Mem/30M,由于大家一般Nginx、MySQL都在一台机器上,于是预留一半给它们,即php-fpm进程数为$Mem/2/30。


调整之后的几个值是:


pm = dynamic
pm.max_children = 50
pm.start_servers = 15
pm.min_spare_servers = 10
pm.max_spare_servers = 40

重启php-fpm服务:service php70-php-fpm reload,继续使用top命令查看内存使用情况,发现十几个php-fpm启动。


php-fpm服务挂掉-


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