[imp] Balancing Question

[Derek Martin]

Thanks Andy and Jon.  To elaborate, I would like to know about currently
logged in users to IMP.  We have experienced in the past a situation
where our server's resources just up and dissapear when lots of people
are logged in and we are trying to isolate why and what program is
causing it.  None of the other HORDE apps do resource consumption as
heavily as IMP I would assume?  As for web server hits per second -
Apache 1.3.27 should be able to handle the types of loads we are talking
about without complaining too much...I hope anyway since it is the
server like 90% of the world uses :-)
Does the IMAPProxy from HORDE significantly reduce this overhead?
BTW - It isn't our IMAP server I really hope - it is a quaint little 2
million dollar SUN box with more power than some mainframes I have seen
- that server is designed and does handle close to 50,000 accounts
pretty well (obviously not all at the same time) <grins>.
Thoughts?

Thanks so much!!!

Derek

-----Original Message-----
From: Andrew Morgan [mailto:morgan at orst.edu] 
Sent: Sunday, January 05, 2003 10:44 AM
To: Derek Martin
Cc: imp at lists.horde.org
Subject: Re: [imp] Balancing Question


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On Sun, 5 Jan 2003, Derek Martin wrote:

> Let's say I have a brand new Dell Poweredge running RH7.3 and the 
> current production versions of all HORDE apps.  The box is a dual XEON

> 2Ghz a piece with 2Gb of RAM and I have 100Gb of space to play with 
> (for possible file caching) and the IMAPProxy 1.0 from HORDE running. 
> With this in mind, what would be a reasonable guess from you guys and 
> gals as to the number of simultaneous users before we started seeing 
> problems running IMP???
>
> Thanks!
> Derek
>
> Derek Martin
> YOU Networks Administrator
> http://you.okstate.edu <http://you.okstate.edu/> 
> derek at younet.okstate.edu

If you can explain what you mean by "simultaneous users", I should be
able to tell you...  :)  Here are some possible interpretations:

1. Number of unique users currently "logged in" to IMP.
2. Number of web server hits per second.
3. Number of IMAP-using (not GIFs) hits per second.

Now, I think Jon is right in saying that your IMAP server will probably
run out of steam before your IMP box.  I've got 2 Dell 2650s with about
the same config as your box.  The load average rarely gets over 0.5, and
most of the time they run at 0.1.  Now the IMAP server on the other
hand...  :)

	Andy

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