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From "Perrin Harkins" <>
Subject Re: [a little OT] mod_proxy 502 errors in dual apache setup
Date Wed, 05 Mar 2008 22:07:07 GMT
On Wed, Mar 5, 2008 at 10:37 AM,  <> wrote:
> 502's show up when you have more connections from the front end to the
>  back end that it can service.

Just to expand on that a little, you should start by checking for
simple things like whether your machine was going into swap or getting
hung up on a particular database query.  If you're running the maximum
mod_perl processes you can fit without going into swap, you either
need to extend the timeout and let people wait or add more hardware.

- Perrin

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