The problem appears to be solved.. We are using the Imail database and have over 1000 domains per box. The problem seems to be directly related to both the inbox size, fragmentation and who is logged in via web messaging. When a few people log on who have large mail boxes, it seems to cause this problem. It could also have to do with the swap file size which we increased to 1500-2000 MB's. I used the defrag program that comes with Win2k to analyze and defrag. I had to do it multiple times and it took a long time because it kept stalling.
I'm not what exactly fixed the problem, just it has gone away. -Frazer -----Original Message----- From: Steve [mailto:[EMAIL PROTECTED]] Sent: Saturday, February 09, 2002 8:37 AM To: [EMAIL PROTECTED] Subject: Re: [IMail Forum] 100% CPU usage problem FIXED? Frazer, We are thinking of upgrading from 6.06 to 7.05 hf2 but I am a little worried about the webmail issue that a few people are reporting. Are you using the Imail database or SQL? When I talked with Ipswitch tech support today they said the problem was only with SQL database Imail installations. We have about 1,000 domains and 20,000 users so we do not want to have avoidable problems. Has your problem been solved? Last question, what defrag software did you use that identified how fragmented specific files are/were? Thanks. Steve ----- Original Message ----- From: "Dan Frazer" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, February 07, 2002 3:58 PM Subject: RE: [IMail Forum] 100% CPU usage problem FIXED? Defragging the drive, cleaning up mailboxes over 100MB's and tripling the swap file size seems to have worked. I noticed that a few single mail boxes were fragmented over 1,000 times, before the defrag. I'm sure that can't be good. Thanks for all the support on this List. You guys rule!! -Frazer -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Len Conrad Sent: Wednesday, February 06, 2002 3:15 PM To: [EMAIL PROTECTED] Subject: RE: [IMail Forum] 100% CPU usage problem >The service doesn't die, it just uses 100% CPU in my case. I Called >Ipswitch which didn't help, they basically blamed it on the Classic >Templates. Going to do a defrag tonight good >double the memory good, but note before and after swappping params. but what service in Imail swappable? none I reckon. they must all be locked into RAM and never swapped. >and clean up >user mailboxes that are over 100MB's in size. yep, imagine iwebmsg (or imap) process needing to repeatedly scan the mbx file to pick up all the headers and chop them into 25 or 50 per html page, then the user deletes some msgs, and the whole re-read of the 100 mb file starts over again. For just one iwebmsg user with a 100 mb file, he can pretty much put the disk drive on its knees. I don't know how iwebmsg handles in memory the msg headers of a 00 mb .mbx, but I'm bet they aren't kept memory, so the disk , for just one user, will be extremely busy. This is a situation where 160 mbyte/sec SCSI disks with 128 megs of on-board controller cache really helps. And having the imail spool directory on a separate controller+drive from the mailbox controllers+drives. and if you have to swap (argh!!), have the swap on a separate controller+drive, or at least in it own dedicated partition. Nothing worse than a fragmented swap space. and of course you don't want ANY swapping going on in a dedicated mailbox server. >Hopefully this will fix the problem. wouldn�t that be nice. Let us know. Len http://MenAndMice.com/DNS-training http://BIND8NT.MEIway.com : ISC BIND 8.2.4 for NT4 & W2K http://IMGate.MEIway.com : Build free, hi-perf, anti-abuse mail gateways Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/
