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Trying to track down the cause of some high server load. Not sure if this has anything to do with it but, in the process manager in whm I noticed about 200 of this process running: /usr/local/apache/bin/httpd -k start -DSSL Each using about 7.6% of the memory. I know httpd is apache, but what exactly is that process? Any ideas? | |||
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Apache MPM-Prefork launches a new process for each connection. It is as inefficient as it sounds, But unfortunately completely normal. I never run apache with MPM-Prefork, It is the default for ease of administration. Apache has two other MPM's available, MPM-Worker and MPM-Event. Worker is multi-threaded and Event is asynchronous. I prefer Worker, as it is more mature and IMO still offers better performance. Some prefer Event, and say otherwise. Either way better then forking a process every time. PHP is by default non-thread safe, some would say no matter what non-thread safe! So you can't use regular mod_php with anything other then MPM-Prefork. You can however use MPM-Worker and serve PHP with FastCGI. I prefer doing FastCGI via PHP-FPM, however with Cpanel it's very easy to do it via mod_fcgi. You should recompile apache with the easyapache script. Update your Cpanel before running easyapache. make sure to choose apache 2.2, PHP 5, MPM-Worker, FastCGI, suEXEC I also choose Suhosin for security, and eaccelerator / Zend optimizer for performance. once the build is done, you will get a menu to choose how to serve php, chose fcgi! read more here http://docs.cpanel.net/twiki/bin/view/EasyApache3/ApachePHPRequestHandling ...Or deal with crappy performance. | |||
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