Hello All,
I have three web servers which periodically crash due to Apache using up all of the RAM on the server. No matter how much RAM we put in, it always happens. Currently, there's 16GB of RAM on each server running Linux x86_64. Watching top, and the RSS of the Apache processes constantly grow. When Apache first starts, the average RSS is 20MB per process. Within an hour or so, it's 128MB per process. Do the math, and at 200 processes that's 25GB. We've imposed memory limits in PHP, we use RLimitMEM in Apache (both are set to 128M). I even wrote a Perl script which runs continuously checking all Apache processes that kills individual children if they go over 80MB for their RSS value. What's interesting is that when the average RSS hits 80MB and my script kills everything, the RSS value resets back to 20MB and the process starts over again. Apache has PHP 5.2.5 compiled in as a DSO module using Apache 2.2.3. The server is an Intel Xeon 5300 sequence server using the Linux kernel 2.6.18-53.1.4.el5smp. Can anyone offer up an explanation for this? Thanks. ---- Graham Frank Neoservers LLC - Founder and Owner Ph: (608) 359-1593 Member of the Better Business Bureau
