That's an unbelievable issue but we have single apache process that takes 4 GB of memory ! And it doesn't happens always with the same URLs, it's unpredictable and we don't understand why it is happening at all !!!
Any help would be greatly appreciated (as well as the users of the website and the owners) !
We even developed for days some software to analyze what is happening !
We do a pmap PID each second when the problems comes up, but the offending line is :
00002aad145c2000 2929376K rw--- [ anon ]
so what can we do with that, is there a way to know what it is ?
We also analyze open files with lsof -p.
It looks like it happens when the connection comes from Google Crawler but I can't tell if it's always the case.
Do you have suggestions on how to analyze ?
The config is Linux+Apache+PHP+Postgresql