[imp] Slow mailbox list from time to time

[Tornoci Laszlo]

Ronan SALMON wrote:
> Tornoci Laszlo <torlasz at xenia.sote.hu> a écrit :
>> 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's not the IMAP box. Using IMAP clients, direct access to the IMAP 
>> box shows absolutely no difference.
>>
> Do you have any hook enabled ?
(Forgot to send the answer to the list.)
Yes, _imp_hook_msglist_format, to display attachment info. Users can't 
live without it. I have always enabled this, and the response times were 
ok before. The slowdowns are only temporary and independent of session 
number.

				Yours: Laszlo