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What is PHP-FPM? Introduction to PHP-FPM management and configuration
What is PHP-FPM? Introduction to PHP-FPM management and configuration
The content of this article is about what is PHP-FPM? The introduction to PHP-FPM management and configuration has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.
What is PHP-FPM?
PHP-FPM is the process manager for FastCGI.
Features of PHP-FPM
Supports advanced process management functions for smooth stop and start
Dynamic and static sub-processes Generate
slow logs to record the abnormal slowness caused by script running
You can listen to different ports and use different php.ini
Management and configuration of PHP-FPM
PHP-FPM management
master The master process understands the following signals:
INT,TERM Terminate immediately
QUIT Terminate smoothly
USR1 Reopen the log file
USR2 Gracefully reloads all worker processes and reloads configuration and binary modules
# 查看 php-fpm 用户 ps aux | grep php-fpm # 查看 php-fpm 进程 pid ps -ef | grep php-fpm # 启动 php-fpm php-fpm -D # 关闭 php-fpm kill -INT [pid] # 重启 php-fpm kill -USR2 [pid]
ps is a snapshot showing the current process.
PHP-FPM configuration
/etc/php-fpm.d The folder contains the configuration of all process pools, in the main configuration file/etc/ There is the following line in php-fpm.conf:
include=/etc/php-fpm.d/*.conf
The main configuration file of php-fpm.conf contains global configuration, and the sub-configuration is the configuration of different process pools, such as www.
Global configuration
# s 秒，m 分，h 小时，d 天 # 子进程在 emergency_restart_interval 设定的时间内收到该参数设定次数的 SIGSEGV 或者 SIGBUS退出信息号，则FPM会重新启动 emergency_restart_threshold 10 # 平滑重启的间隔时间： emergency_restart_interval 1m # 子进程接受主进程复用信号的超时时间 process_control_timeout 10s
Process pool configuration
# 接收 FastCGI 请求的地址 listen： 'ip:port', '/path/to/unix/socket' # 设置进程管理器如何管理子进程 pm: static 固定数量, ondemand 进程在有需求时才产生, dynamic 动态设置
static and dynamic configuration
If the memory is relatively small and the concurrency is not very large, you can consider using it dynamic method, which can control the total memory consumed by php-fpm.
When concurrency is high or traffic fluctuates greatly, using static can achieve a faster response than dynamic under high concurrency.
Number of configurable processes = php-fpm configurable memory / (memory footprint of php-fpm child process * 1.2)
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