I ended up increasing the RAID cache. As far as loading, maybe related.
But you know....more likely...you may have as few as 1 (one!) client
crashing your server. One bad communication to the IMAP service can kill
it. Most unfortunate that this can happen. But it can and does. I still
say maybe look more closely at logs. IF you know exactly when the service
stops, can you also find anything else that happens at exactly that
time....say perhaps a particular user trying to do something freaky.....
Stabbing in the dark.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Jeremy Krall
Sent: Wednesday, September 06, 2000 8:58 AM
To: [EMAIL PROTECTED]
Subject: RE: [IMail Forum] Dr Watson Crashes in Imail 6.02- IMAP4d32.exe
Answers to your questions:
1. The problem does subside if IMAP is stopped
2. The logs only show that IMAP basically stopped working at this time
3. We are not using Imail's Web Messaging but we do interface with the
IMail server through ASP and COM. Are you thinking it is load related?
4. This is intriguing, we run a raid on this machine... how would we go
about clearing the cache?
5. Perf Mon shows everything is fine except that IMAP is dead. It is so
sporadic that it is difficult to predict when it might happen.
Thanks for the help,
Jeremy
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Dave Marchette
Sent: Wednesday, September 06, 2000 12:43 PM
To: [EMAIL PROTECTED]
Subject: RE: [IMail Forum] Dr Watson Crashes in Imail 6.02- IMAP4d32.exe
The obvious:
1 If you disable IMAP does the problem subside
2 Do the logs give you any clue......does the crash take out the whole box
or just certain services -- maybe a mem problem
3 Are you using web messaging? From experience I know that a dual pentium
can't handle that kind of web messaging load (80k)on its own....*unless* you
have around 2 gig of memory in the thing.
4 I had the IMAPD32 error when a raid controller's cache became
consistently saturated. Dunno why exactly. Easy fix.
5 Does perm mon tell you anything interesting? Look for odd things like
page write faults, etc.
6 80 K users? Wow.
7 80 K users? Argh.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Jeremy Krall
Sent: Wednesday, September 06, 2000 8:06 AM
To: [EMAIL PROTECTED]
Subject: [IMail Forum] Dr Watson Crashes in Imail 6.02- IMAP4d32.exe
Hi all,
We are currently running around 80K users on a Dual 500 NT box and up until
the beginning of this week, everything has been perfect (Imail 6.02). As
the users started to increase we have started seeing Imail crashes at random
times. We actually see Dr Watson errors (access violation in IMAP4d32.exe)
in the Event Viewer and then need to restart in order to get things working.
I am curious if anyone has seen similar problems and has any ideas for a
fix. I am a bit against upgrading unless we need too, just because of
everyone's headaches so any other ideas would be great. This machine
connects to the another SQL server for user login data and we are using the
third party ODBC driver that Ipswitch (doesn't) support. We are running
only Imail on this machine and also McAfee RemoteDesktop and BMC Patrol.
Keep in mind no issues arose until we hit around 75K users.
Please help if you can and thanks in advance,
Jeremy
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