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From Greg Ames <>
Subject Re: worker MPM: it sucks to have minimal MaxSpareThreads
Date Tue, 08 Mar 2005 19:03:10 GMT
Jeff Trawick wrote:

> Then realize you need to support boatloads more clients, so you bump
> up MaxClients to 5000.  Now when load changes very slightly (as a
> percentage of MaxClients), which happens continuously, the web server
> will create or destroy a child process.  

> b) tweak worker MPM to automatically bump the value of MaxSpareThreads
> to at least 15% of MaxClients, with a warning written to the error log

+1 to b), btw.

we've had offline discussions about optimizing MaxSpareThreads according to the 
variance seen in busy threads, but that's for admins who know what they're 
doing.  15% is pretty conservative and should help sites with less experienced 


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