[imp] upgrade from IMP3 -> IMP4 : serious performance hit

[Chris J. Alexander]

The only two that I had enabled were

$conf['mailbox']['show_attachments'] & $conf['mailbox']['show_xpriority']

which I have now disabled.  The load is still climbing though.

Is the new Horde/IMP much more DB intensive?  Perhaps I need to focus on the 
MySQL installation?  That process seems very 'hot' now, much more so than 
before.  But if the app needs that extra DB interaction, there isn't much I can 
do beyond throw hardware at the problem.  Is there a quick'n'dirty way to 
profile what's eating all my CPU?  I've tried truss'ing the processes but 
gleaned nothing helpful.  Error logging is turned up, but not revealing anything 
to me either.

I am using the Horde VFS with the MySQL DB on the one server, but again that was 
being used before as well.  I tried very hard to make sure the *only* change was 
the upgrade from IMP 3 -> IMP 4.

There are a total of 4000 sessions in the DB split among the two Solaris boxes - 
these are v280R's w/ 4 GB of RAM, that should be plenty of headroom, shouldn't 
it?

Thank you for continued help :)

CJA

----- Original Message ----- 
From: "Jan Schneider" <jan at horde.org>
To: <imp at lists.horde.org>
Sent: Tuesday, July 19, 2005 11:38 AM
Subject: Re: [imp] upgrade from IMP3 -> IMP4 : serious performance hit


> Zitat von "Chris J. Alexander" <cjalexa at emory.edu>:
>
>
>> Is this just a symptom that I need much much larger hardware to run the new
>> version of Horde for my installation?  My higher ups are screaming at
>> me every
>> hour to do something about it; I don't want to downrev if I can help
>> it, but I
>> may not have a choice since I can't produce new hardware that fast.
>
> It's a fact that Horde 3/IMP 4 need more power than Horde 2/IMP 3, but
> not *that* much more. Did you try disabling all perfomance hungry
> configuration settings in IMP?
>
> Jan.
>
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