私はCentos6サーバーにインストールして、Wordpressの忙しいブログをホストしました。
CPU：Intel Xeon E3 1245v2-4コア-8スレッドRAM：32 Go DDR3
Nginx、PHP-FPM、およびAPC
バージョン：
PHP 5.4.9（fpm-fcgi）（ビルド：2012年11月22日11:33:35）
nginxバージョン：nginx / 1.2.5
ウェブサイトは最初の日は機能していて、TCPの代わりにUNIXソケットを使用しました
PHP-FPMのエラーログ：
[14-Dec-2012 01:33:45] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 32 children, there are 3 idle, and 205 total children
[14-Dec-2012 01:34:08] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 8 children, there are 3 idle, and 222 total children
[14-Dec-2012 01:34:35] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 8 children, there are 0 idle, and 240 total children
[14-Dec-2012 01:34:44] WARNING: [pool www] server reached pm.max_children settin g (250), consider raising it
[14-Dec-2012 14:21:22] NOTICE: Terminating ...
[14-Dec-2012 14:21:22] NOTICE: exiting, bye-bye!
[14-Dec-2012 14:21:23] NOTICE: fpm is running, pid 2345
[14-Dec-2012 14:21:23] NOTICE: ready to handle connections
[14-Dec-2012 14:21:30] WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 8 children, there are 4 idle, and 9 total children
[14-Dec-2012 14:24:39] WARNING: [pool www] child 2354 exited on signal 7 (SIGBUS ) after 191.690193 seconds from start
[14-Dec-2012 14:24:39] NOTICE: [pool www] child 2510 started
pm.max_childrenの値を増やしましたが、成功しませんでした
PHP-FPM構成：
; If this number of child processes exit with SIGSEGV or SIGBUS within the time
; interval set by emergency_restart_interval then FPM will restart. A value
; of '0' means 'Off'.
; Default Value: 0
emergency_restart_threshold = 10
; Interval of time used by emergency_restart_interval to determine when
; a graceful restart will be initiated. This can be useful to work around
; accidental corruptions in an accelerator's shared memory.
; Available Units: s(econds), m(inutes), h(ours), or d(ays)
; Default Unit: seconds
; Default Value: 0
emergency_restart_interval = 1m
; Time limit for child processes to wait for a reaction on signals from master.
; Available units: s(econds), m(inutes), h(ours), or d(ays)
; Default Unit: seconds
; Default Value: 0
process_control_timeout = 10s
デフォルトのプール構成：
; The number of child processes to be created when pm is set to 'static' and the
; maximum number of child processes to be created when pm is set to 'dynamic'.
; This value sets the limit on the number of simultaneous requests that will be
; served. Equivalent to the ApacheMaxClients directive with mpm_prefork.
; Equivalent to the PHP_FCGI_CHILDREN environment variable in the original PHP
; CGI.
; Note: Used when pm is set to either 'static' or 'dynamic'
; Note: This value is mandatory.
pm.max_children = 250
; The number of child processes created on startup.
; Note: Used only when pm is set to 'dynamic'
; Default Value: min_spare_servers + (max_spare_servers - min_spare_servers) / 2
pm.start_servers = 5
; The desired minimum number of idle server processes.
; Note: Used only when pm is set to 'dynamic'
; Note: Mandatory when pm is set to 'dynamic'
pm.min_spare_servers = 5
; The desired maximum number of idle server processes.
; Note: Used only when pm is set to 'dynamic'
; Note: Mandatory when pm is set to 'dynamic'
pm.max_spare_servers = 70
; 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