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From ludi <>
Subject Re: [users@httpd] Why the sudden need to raise MaxClients?
Date Wed, 08 Feb 2006 06:22:55 GMT
You can check /var/log/messege. If your kernel open the syn-cookie,
you will be notice when the dos happens.

2006/2/8, <>:
> We are using Apache 2.0.54 on Debian GNU/Linux (standard Debian
> packages). The server had been running for several months with
> absolutely no problems. A couple of days ago, Apache started slowing
> down, then would eventually stop responding completely. The only way
> to fix it was to restart Apache. It got to the point that Apache
> would only stay functional for a few seconds at a time. Watching the
> Apache logs revealed no unusual activity before the lockup.
> I discovered the MaxClients setting, which in Debian defaults to 20
> for the prefork MPM. I raised it to 100, and the problem went away. I
> believe the default for this value is normally 256.
> What would cause this problem all of the sudden? My first thought was
> a DOS attack. Am I on the right track?
> --df
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