[imp] Sluggish horde/imp

[Kevin Konowalec]

On Jun 21, 2005, at 2:16 PM, Benoit St-Andre wrote:

> Le mar, jun 21, 2005 at 02:04:55 -0600, Kevin Konowalec a écrit:
>
>>  Thanks for your reply!  Unfortunately it didn't help - all my  
>> DNS  info is correct as well as my /etc/hosts
>>  file.
>>
>>  I just checked and it seems we have PHP 5 on this machine...  
>> could  that be an issue?
>>
>>
>>
>>  On Jun 21, 2005, at 1:54 PM, Benoit St-Andre wrote:
>>
>>
>>> Le mar, jun 21, 2005 at 01:39:11 -0600, Kevin Konowalec a écrit:
>>>
>>>> I'm got an IBM 325E server running OpenBSD with the latest releases
>>>> of Horde and Imp.  Cyrus mailserver.  There's lots of memory and  
>>>> lots
>>>> of disk.  The mcrypt extension is enabled in php.ini and the  
>>>> garbage
>>>> collection is set to be 1/100 probability.  Right now we're in pre-
>>>> production mode and only have a handful of concurrent users but
>>>> things are incredibly sluggish.  I've tried moving sessions from an
>>>> external MySQL backend to local PHP default sessions with zero
>>>> effect.  Logging on initially takes upwards of 40 seconds to get to
>>>> my inbox.  Is there any place I should be looking for obvious
>>>> performance boosts?
>>>>
>>> All the time I had those kind of problems, wrong or incomplete dns
>>> information was the key factor. Make sure everything is well in  
>>> order
>>> (information in /etc/hosts , correct dns resolution in /etc/  
>>> resolv.conf,
>>> etc). Often, we use IP adresses instead of domain names, but  
>>> it's  easy to
>>> forget that a lot of processes in linux do dns query and reverse   
>>> dns query
>>> in the first time. When you add this effect on a small number of   
>>> users,
>>> that caused (for us at least) some delays of the same kind that  
>>> you  are
>>> telling.
>>> -- Benoit St-André
>>> ben at benoitst-andre.net
>>> Mon carnet web: http://benoitst-andre.net/blog/
>>> Connaissez-vous Linuxédu-Québec ? http://linuxeduquebec.org
>>>
>>
>>
>
> Reading myself, I thought I could be a little more specific.
>
> If you try to connect from your horde server to your mail server (say,
> using a telnet client), do you get an instant response from your  
> server ?
> (maybe your mail server is on the same server as horde, in which  
> case my
> dns issues fallout...).
> -- 
> Benoit St-André
> ben at benoitst-andre.net
> Mon carnet web: http://benoitst-andre.net/blog/
> Connaissez-vous Linuxédu-Québec ? http://linuxeduquebec.org
>


Yes... it does a quick lookup and responds immediately.