[imp] High load for httpd seen when running imp4/horde3

[Jan Schneider]

Zitat von imp-archive at cloud9.net:

> I'm seeing a problem with our imp4/horde3 setup that was not previously a
> problem with our previous imp3/horde setup.  The load on the machine that
> we are using for the imp/horde system is regularly hitting almost 20 on
> the 5-min average, and with this users are experiencing extreme slowness,
> even some IE users are reporting their browser hanging on redirect.php
> without proceeding to their INBOX page.  I have already installed Turck
> MMCache for PHP, which has sped up the generation of e-mail index lists,
> but this intermittent load issue continues to be a problem.  Whenever I
> look at top, I usually see httpd occupying the top five or six places.
>
> Any advice on where I should look next?

Try to find out what processes are waiting, and what they are waiting 
for. Could be the web server, the mail server, the db server.
Try to strace the web server processes to find out what they are 
actually doing.

Jan.

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