PHP 5.4.36 Released

FastCGI 进程管理器(FPM)

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FPM(FastCGI 进程管理器)用于替换 PHP FastCGI 的大部分附加功能,对于高负载网站是非常有用的。

它的功能包括:

  • 支持平滑停止/启动的高级进程管理功能;

  • 可以工作于不同的 uid/gid/chroot 环境下,并监听不同的端口和使用不同的 php.ini 配置文件(可取代 safe_mode 的设置);

  • stdout 和 stderr 日志记录;

  • 在发生意外情况的时候能够重新启动并缓存被破坏的 opcode;

  • 文件上传优化支持;

  • "慢日志" - 记录脚本(不仅记录文件名,还记录 PHP backtrace 信息,可以使用 ptrace或者类似工具读取和分析远程进程的运行数据)运行所导致的异常缓慢;

  • fastcgi_finish_request() - 特殊功能:用于在请求完成和刷新数据后,继续在后台执行耗时的工作(录入视频转换、统计处理等);

  • 动态/静态子进程产生;

  • 基本 SAPI 运行状态信息(类似Apache的 mod_status);

  • 基于 php.ini 的配置文件。

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User Contributed Notes 4 notes

up
11
joel k
3 years ago
the fpm process supports the USER2 signal, which is used to reload the config file.

kill -USR2 [pid]

should do the trick.
up
9
robin at robinwinslow dot co dot uk
4 years ago
Init script setup
===

You will probably want to create an init script for your new php-fpm. Fortunately, PHP 5.3.3 provides one for you, which you should copy to your init directory and change permissions:

$ cp <php-5.3.3-source-dir>/sapi/fpm/init.d.php-fpm.in /etc/init.d/php-fpm
$ chmod 755 /etc/init.d/php-fpm

It requires a certain amount of setup. First of all, make sure your php-fpm.conf file is set up to  create a PID file when php-fpm starts. E.g.:
----
pid = /var/run/php-fpm.pid
----
(also make sure your php-fpm user has permission to create this file).

Now open up your new init script (/etc/init.d/php-fpm) and set the variables at the top to their relevant values. E.g.:
---
prefix=
exec_prefix=
php_fpm_BIN=/sbin/php-fpm
php_fpm_CONF=/etc/php-fpm.conf
php_fpm_PID=/var/run/php-fpm.pid
---

Your init script is now ready. You should now be able to start, stop and reload php-fpm:

$ /etc/init.d/php-fpm start
$ /etc/init.d/php-fpm stop
$ /etc/init.d/php-fpm reload

The one remaining thing you may wish to do is to add your new php-fpm init script to system start-up. E.g. in CentOS:

$ /sbin/chkconfig php-fpm on

===========

Disclaimer: Although I did just do this on my own server about 20 mins ago, everything I've written here is off the top of my head, so it may not be 100% correct. Also, allow for differences in system setup. Some understanding of what you are doing is assumed.
up
4
kokushibyou at gmail dot com
1 year ago
PHP-FPM is FAST - but be wary of using it while your code base is stored on NFS - under average load your NFS server will feel some serious strain. I have yet to find a work around for this bug: https://bugs.php.net/bug.php?id=52312
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1
dreamcat4 at gmail dot com
7 months ago
Doesn't work? Enable logging!

The php-fpm.log file is a great place to fault-find errors and get to the bottom of a problem. But be sure to enable logging for your specific worker pool. Or you won't see anything!

Example:

To enable error logging for the default [www] worker pool, add this line in the [www] section of your php-fpm.conf:

[www]
catch_workers_output = yes
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