My server goes down from time to time. When it does, it is still on but none of 
the services respond (no response from SSH, Apache, ping, etc). The server is 
just a web server. Each time, I reboot it and it comes back up just fine. I'm 
trying to figure out what keeps taking it down. I've wondered if it was a bad 
hard drive in the RAID, but after looking at the Apache logs just now and 
seeing a plethora of memory leak notices, I'm wondering if it's a memory issue. 
Would a bad script that is leaking memory cause the machine to run out of 
memory and then freeze up or cause all of the services to become 
non-responsive? The answer seems very likely but I would be interested in any 
pointers as to how to narrow this problem down.

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