kolab 2.2

[Gunnar Wrobel]

Quoting Gabriele Di Giambelardini <gabriele_d_g at yahoo.it>:

>  10pt;\"> Hi, to all
> The real problem is the cyrus imap use 100% CPU only when we use
> horde webmail.
> We try to use a different webmail and everythings work well..

The Horde version in the current Kolab Server release has not yet been  
really optimized to high load situations. It is specifically lacking  
one level of caching that you will only get in the next Kolab Server  
version.

I expect in your case Horde is still listing all IMAP folder *for  
every page view*. This is extremely inefficient and needed some  
serious rewrite of the Horde/Kolab storage handling to get solved in a  
better way. This will be part of Kolab-Server-2.2.1.

Even with that version I'd still be very careful with using the Horde  
groupware features with a Kolab server if you have many users. While  
Kolab code in Horde has seen some dramatic improvement over the last  
years I still see many areas where optimizations will be required to  
make it a very lean client that does not tax the main server too much.

Cheers,

Gunnar

>
> So I suspect is some horde parameter...
>   font-size: 10pt;\">
>  13px;\">
> -------------------------
> DA: Alain Spineux
> <aspineux at gmail.com>
> A: Gabriele Di
> Giambelardini <gabriele_d_g at yahoo.it>
> CC:
> kolab-users at kolab.org
> INVIATO: Domenica 26
> ottobre 2008, 18:49:15
> OGGETTO: Re: kolab 2.2
>
> On Thu, Oct 23, 2008 at 3:30 PM, Gabriele Di Giambelardini
> <gabriele_d_g at yahoo.it[1]> wrote:
> > Hi to all, I have a big problem with kolab 2 performance.
> > I have an server with 10 GB of RAM and about 150000 users.
>
> 150K users is a lot on a single server running all the mail stuff !
> Which OS are your running ?
> Are you using a 64bits OS ?
> Are your 10GB of RAM all in use ?
> Maybe this page could give you some hints on how it is difficult to
> tune a mail server !
>
href=\"http://blog.fastmail.fm/2007/09/21/reiserfs-bugs-32-bit-vs-64-bit-kernels-cache-vs-inode-memory/\">http://blog.fastmail.fm/2007/09/21/reiserfs-bugs-32-bit-vs-64-bit-kernels-cache-vs-inode-memory/
> Are you using a RAID 5 ? RAID 10 could give you better performances
> !
>
>
> > After I imported the user in the kolab ldap the server become
> very very
> > slow, it's impossible use a webmail. so I installed the
> webmail on other
> > server with eaccelerator.
> > But now on my main server the kolab imapd take all the CPU and
> every thing
> > is too slow.
> > The are some settings for imap of if somebody know the why of
> this
> > latency...
> > THANKS
> >
> > ________________________________
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> > opinione!
> > _______________________________________________
> > Kolab-users mailing list
> > Kolab-users at kolab.org[2]
> >
href=\"https://kolab.org/mailman/listinfo/kolab-users\">https://kolab.org/mailman/listinfo/kolab-users
> >
> >
>
> -- 
> Alain Spineux
> aspineux gmail com
> May the sources be with you
>
> _______________________________________________
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> Kolab-users at kolab.org[3]
>
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>    -------------------------
> Scopri il  Blog di Yahoo! Mail[4]:
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-- 
______ http://kdab.com _______________ http://kolab-konsortium.com _

p at rdus Kolab work is funded in part by KDAB and the Kolab Konsortium

____ http://www.pardus.de _________________ http://gunnarwrobel.de _
E-mail : p at rdus.de                                 Dr. Gunnar Wrobel
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