Centos – Apache processes are not ending

apache-2.2centosprocess

I have KeepAlive on with 15 second timeout enabled. But processes are not ending. And it causes big number of apache processes which ends with server freeze. The only option is to hard reset server.

Why this happens? How to prevent this?

Best Answer

Most likely MaxClients is too high. Depending on your MPM, too many clients causes the process count problems you see.

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Tomcat – Apache + mod_jk + tomcat: too many apache processes created

take a loog at this Apache doc: http://httpd.apache.org/docs/2.0/mod/mpm_common.html#maxclients With this you can regulate your maximum number of processes.

When your tomcat/app is working as it should tomcat releases the connection. Make sure your webapp is not blocking the connections by doing too long requests to a backend or something else.

Christian

Linux – Apache spawning hundreds of processes and pushing up load averages

It's the value of your ServerLimit setting and others inside httpd.conf:

StartServers       8
MinSpareServers    5
MaxSpareServers   20
ServerLimit      256
MaxClients       256
MaxRequestsPerChild  4000

Dial down your ServerLimit to 100 or so and decrease MaxRequestPerChild to around 1000 so the children reap faster.

Best Answer

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Tomcat – Apache + mod_jk + tomcat: too many apache processes created

Linux – Apache spawning hundreds of processes and pushing up load averages

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