Zitat von Tornoci Laszlo <torl...@xenia.sote.hu>:
Hi,
I have a Horde/IMP system that behaves strangely since I upgraded
from 3.1.5/4.1.5 to 3.3.4/4.3.4. I have about 400 users with 50-70
concurrent sessions usually. The IMAP mailstore (Cyrus) and the MTA
are on separate boxes. The system is dual Xeon (quad core) 2GHz, 2GB
RAM.
We had excellent response times before the upgrade. The problem is,
we still have excellent response times (practically instantaneous
mailbox lists with > 3000 mails in one folder) most of the time, BUT
sometimes for long periods of time, I get miserable response times
(30-80 sec waiting) for the same large mailbox to be listed. "top"
show the http process to shoot up to 100% cpu while waiting, but
nothing else remarkable. Restarting http or mysqld doesn't help.
Logging in is not slow. The larger a mailbox, the worse the problem
is.
After some time, response times get back to normal.
It *may* be Horde Alarms. As far as i remember there was a problem
with the way Horde Alarms uses the Database in some configurations but
i can't remember for sure. This could explain why you see it only
occasionally. Another point to check is if you are using a PHP
accelerator which do maintenance at the slow times.
Regards
Andreas
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