php-fpm：日志中的数百秒

Question

我有 nginx+php-fpm 网络服务器

所以我在 php5-fpm.log 中注意到了许多奇怪的行：

[03-Sep-2013 09:25:23] NOTICE: [pool www] child 23999 exited with code 0 after 321.832329 seconds from start
[03-Sep-2013 09:25:23] NOTICE: [pool www] child 24082 started
[03-Sep-2013 09:25:41] NOTICE: [pool www] child 24032 exited with code 0 after 259.247887 seconds from start
[03-Sep-2013 09:25:41] NOTICE: [pool www] child 24083 started
[03-Sep-2013 09:25:47] NOTICE: [pool www] child 24033 exited with code 0 after 255.954602 seconds from start
[03-Sep-2013 09:25:47] NOTICE: [pool www] child 24084 started
[03-Sep-2013 09:25:50] NOTICE: [pool www] child 24014 exited with code 0 after 327.620462 seconds from start
[03-Sep-2013 09:25:50] NOTICE: [pool www] child 24085 started
[03-Sep-2013 09:25:55] NOTICE: [pool www] child 24034 exited with code 0 after 254.974653 seconds from start
[03-Sep-2013 09:25:55] NOTICE: [pool www] child 24086 started
[03-Sep-2013 09:26:01] NOTICE: [pool www] child 24035 exited with code 0 after 253.388234 seconds from start
[03-Sep-2013 09:26:01] NOTICE: [pool www] child 24087 started
[03-Sep-2013 09:26:02] NOTICE: [pool www] child 24036 exited with code 0 after 251.374430 seconds from start
[03-Sep-2013 09:26:02] NOTICE: [pool www] child 24088 started
[03-Sep-2013 09:26:05] NOTICE: [pool www] child 24019 exited with code 0 after 325.601766 seconds from start
[03-Sep-2013 09:26:05] NOTICE: [pool www] child 24089 started
[03-Sep-2013 09:26:09] NOTICE: [pool www] child 24037 exited with code 0 after 255.871955 seconds from start
[03-Sep-2013 09:26:09] NOTICE: [pool www] child 24090 started
[03-Sep-2013 09:26:09] NOTICE: [pool www] child 24038 exited with code 0 after 255.884311 seconds from start
[03-Sep-2013 09:26:09] NOTICE: [pool www] child 24091 started
[03-Sep-2013 09:26:09] NOTICE: [pool www] child 24039 exited with code 0 after 254.826181 seconds from start
[03-Sep-2013 09:26:09] NOTICE: [pool www] child 24092 started
[03-Sep-2013 09:26:12] NOTICE: [pool www] child 24040 exited with code 0 after 256.232759 seconds from start
[03-Sep-2013 09:26:12] NOTICE: [pool www] child 24093 started
[03-Sep-2013 09:26:14] NOTICE: [pool www] child 24027 exited with code 0 after 321.722533 seconds from start

谁能告诉我，这些秒是after 321.722533 seconds from start什么样的，它是什么意思？

UPD

我的配置是：

pm = dynamic
pm.max_children = 50
pm.start_servers = 20
pm.min_spare_servers = 5
pm.max_spare_servers = 35
pm.max_requests = 100

Answer 1

“秒”是时间单位；其中 321 个是五分钟多一点。

您的进程退出和重新生成的原因是您已pm.max_requests在 php-fpm 池配置文件中设置了该选项。

例如，取自默认配置：

; The number of requests each child process should execute before respawning.
; This can be useful to work around memory leaks in 3rd party libraries. For
; endless request processing specify '0'. Equivalent to PHP_FCGI_MAX_REQUESTS.
; Default Value: 0
pm.max_requests = 500

我们可以在您的配置中看到它设置为100，因此 php-fpm 在处理 100 个请求后会回收该进程。