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jonathanserafini
Asked: 2010-05-27 12:07:36 +0800 CST

Apache2 worker mpm too many processes

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I've got Apache installed with the worker mpm which seems to have too many processes active in spite of the configurations in place. I'll detail the configs below : 

StartServers 2
MinSpareThreads 10
MaxSpareThreads 25
ThreadsPerChild 25
MaxClients 150

Based on these settings, we should be seeing a maximum of 1 Apache control process (uid:root) and 6 Apache client processes (uid:www). This being due to MaxClients/ThreadsPerChild.

However, I'm seeing a total of 1 Apache control process and 9 Apache client processes.

init
-- apache2(root)
-- -- apache2(www)
-- -- apache2(www) -- 1 thread
-- -- apache2(www) -- 26 threads
-- -- apache2(www) -- 26 threads
init
-- apache2(www) -- 2 threads
-- apache2(www)
-- apache2(www)
-- apache2(www)

We do not make it a habit of restarting Apache nor the Server, and will perform a reload 2-3 times a day at times so as to add new VHOSTs.

Would anyone be able to enlighten me as to what might be causing this ? enter code here

apache-2.2 threads process mpm-worker

1 Answers

  1. Best Answer

    MaxClients doesn't determine the number of child processes - the number of child processes multiplied by the number of ThreadsPerChild determines the maximum acceptable value of MaxClients.

    To meet your values of 6 child processes and 150 maxclients, use the following settings:

    StartServers 2
ServerLimit 6
MinSpareThreads 10
MaxSpareThreads 35
ThreadsPerChild 25
MaxClients 150

    Note also that I modified the MaxSpareThreads value. From the documentation:

    The range of the MaxSpareThreads value is restricted. Apache will correct the given value automatically according to the following rules:

    * mpm_netware wants the value to be greater than MinSpareThreads.
* For worker the value must be greater or equal than the sum of MinSpareThreads and ThreadsPerChild.
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