php-fcgi periodically shutting down for Nginx running Centos 6.5

php-fcgi periodically shutting down 1-3 times a week. The server spec is:

Server RAM: 512 MB
CPU: 1 Core
OS: Centos 6.5
Web Server: Nginx 1.0.10
PHP: 5.3.3
MySQL: 5.1.73

Do you have any idea to solve this issue? I have actually also posted at:

but didn’t get any answers.

Thank you.

Are you on a VPS? Sounds like you could be running out of memory.

Please post the output of this (if it exists) “cat /proc/user_beancounters”

The file doesn’t exist, here is the result

cat: /proc/user_beancounters: No such file or directory