Issues executing shell scripts via PHP

[ImZan]

I'm having issues with executing a Shell script via PHP on the server. What it executes is a shell script that runs a java program. The program runs just fine under the user account that PHPsuExec is trying to execute this on .


relevant details are :

System has 22GB of ram
12GB is free in caches.
15GB is free.

LSWS : 4.2.2
PHP : 5.3.x
PHP Memory Limit : 999M

Application Memory Limit in the lsphp external app : 900mb in soft limit / 2200mb in hard limit

I am really not understanding why the shell script is unable to execute and giving errors about not having enough ram.

 

[mistwang]

I think you just keep increasing the limit. PHP itself uses memory as well, may not have enough memory left.
you can also change memory limit with

ulimit -v ....

from shell, then try your PHP script.