For some reason, php-fpm keeps locking up and/or hanging. It works for a little while, and then it will randomly just 'hang' for a long time upon trying to load a webpage. There's absolutely nothing in my php-fpm.log about it, and I have no idea how to track down the problem otherwise. Can you guys help me track it down by pointing me in a new direction?

CentOS 6.2

[root@3AC19 ~]# php-fpm -v    
PHP 5.3.9 (fpm-fcgi) (built: Jul  5 2012 04:04:34)

1 Answer 1


Try to profile the hung php-fpm process using strace -p <PID_of_php-fpm process>. You can also try to get stacktrace samples using gdb, more details here.

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