Windows – Apache under windows %100 cpu usage

apache-2.2windowswindows-server-2003

Hi since monday morning my apache server started using %100 of cpu and all the sites are responding so slow. I know it's not a good idea to use windows server 2003 and apache server together but I had to use windows. I tryed to check the status with apache status, but it does'nt show which proccess uses how much cpu (there is no cpu usage column in my apache status report). According to apache status I get mostly 2-3 requests/second. My server is VDS(IBM blade server) with 1 gb memory and 40 gb hdd. I had no problems last saturday everyting started modnay morning, Please help me to identify the problem. What tools can I use to find out what's the problem.

Best Answer

You're right that this isn't normal. For diagnosing problems like this, my first line of diagnosis under Windows is a combination of Procmon and Process Explorer, both free tools from the Sysinternals suite.

Do a Google for Sysinternals and download the suite from Microsoft. Procmon will tell you what processes are accessing what items in the filesystem and keys in the registry, while Process Explorer is like Task Managers on super-steroids. Plus the Sysinternals suite includes a lot of other handy extras.

These tools don't always point out what the problem is, but they might help you narrow down what is causing the issue.

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I've had success with Sysinternals Process Explorer. With this, you can search to find what process(es) have a file open, and you can use it to close the handle(s) if you want. Of course, it is safer to close the whole process. Exercise caution and judgement.

To find a specific file, use the menu option Find->Find Handle or DLL... Type in part of the path to the file. The list of processes will appear below.

If you prefer command line, Sysinternals suite includes command line tool Handle, that lists open handles.

Examples

c:\Program Files\SysinternalsSuite>handle.exe |findstr /i "e:\" (finds all files opened from drive e:\"
c:\Program Files\SysinternalsSuite>handle.exe |findstr /i "file-or-path-in-question"

Ubuntu – 100% apache cpu usage after upgrade

I ended up solving it this way:

sudo dpkg --get-selections | grep apache
sudo dpkg --get-selections | grep php

to find all of the apache/php packages, and then

sudo apt-get remove --purge apache2 apache2-mpm-worker apache2-threaded-dev apache2-utils apache2.2-common libapache2-mod-python libapache2-mod-python-doc libapache2-mod-wsgi

to completely remove them.

Then reinstalled the same packages using

sudo apt-get install apache2 apache2-mpm-worker apache2-threaded-dev apache2-utils apache2.2-common libapache2-mod-python libapache2-mod-python-doc libapache2-mod-wsgi

This gives you a completely fresh install of Apache and PHP.

Thanks to http://dancingpenguinsoflight.com/2009/02/how-to-completely-reset-an-apache-instance-in-ubuntu/

Best Answer

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