PHP processes run one at a time, always taking 100% of one core
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Derek Kurth
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Published on 2012-03-24T17:03:50Z
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2012/03/24
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We have seven websites written in PHP running on a Windows 2008 server with IIS 7.5. They are all very slow right now.
When I look in Task Manager, I see around 10 php-cgi.exe processes, and they are all taking 0% of the CPU, except one, which is taking 25%. It's a quad-core server, so it's taking 100% of one core.
If I watch for a few seconds, the process taking 25% will go to 0%, and a different php-cgi.exe process will jump to 25%. So all the php-cgi.exe processes are just lined up, waiting on a single core, and each process uses 100% of the processor when it can.
Each of the 7 sites is in its own application pool in IIS, and we're using FastCGI. The PHP version is 5.3.
Any ideas? Thanks!
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