I am running the following on a Dell R610 (Quad core & 12GB RAM): Red Hat Enterprise Linux Server release 5.5 httpd 2.2.3 PHP 5.1.6
The web application running on this server is randomly leaking memory. Since the application is fairly big I have spent today trying to come up with a way to profile or trace the culprit script. The best tool I have so far is strace using
strace -p PID -tt -o trace4.log -s 256. Unfortunately the memory usage can jump from 20m to 791m in a matter of seconds so running strace on the culprit process does not yield anything useful.
I tried starting httpd using strace
strace -f -o trace_all.log /etc/init.d/httpd start, but unfortunately this causes extreme lag and unresponsiveness since the site receives fairly high traffic.
I understand that it is not best practice to debug in the production environment, but I am trying to narrow down what page and/or script is causing this issue and have been unable to replicate the problem when testing in the development environment
Any suggestions would be greatly appreciated.