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Posted to modperl@perl.apache.org by Stas Bekman <st...@stason.org> on 2002/11/11 15:57:44 UTC
Re: httpd - where are these zombies coming from?
Tim Gardner wrote:
> I'm having trouble with zombies. Red Hat 7.1 on a Dell server with 1 GB
> memory. The following ps output shows a somewhat typical output.
> Sometimes there are no zombies, but most of the time there are several,
> and often as many as this. Performance often seems sluggish, and I am
> assuming that this is because of this problem, though I don't know that
> for sure. Turning off the database lowers usage and decreases the
> number of zombies, but I don't know if this is due to the database or to
> the lower usage.
>
> I can't figure out what is going on. Any help / suggestions would be
> much appreciated.
[...]
check
http://perl.apache.org/docs/1.0/guide/performance.html#Forking_and_Executing_Subprocesses_from_mod_perl
in particular
http://perl.apache.org/docs/1.0/guide/performance.html#Avoiding_Zombie_Processes
my guess is that you use fork or its variations which leaves zombies.
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