Have you cranked up logging on the IS, and/or are you seeing anything of
note in the event log?  Have you tried re-running performance optomizer?
Sometimes that will cure 'unusual' problems for no good reason.


-----Original Message-----
From: Sauer, Steve [mailto:[EMAIL PROTECTED]] 
Sent: Thursday, August 29, 2002 8:01 AM
To: Exchange Discussions
Subject: RE: Exchange 5.5 IS disk at 100% utilization - HELP!


I doubled the raid 5 IS storage space last night and everything looked
good until this morning.  It is still pegging the IS disk with reads.  I
turned logging up to maximum but can't see anything out of line.
Maintenance is not running, Queues are clear.  I found nothing in
technet or the Knowledge base.  I do know that once about every 25
minutes the disk activity returns to "normal" levels for about 1-2
minutes.  Then the cycle repeats.  The times are not consistent though
and can vary by as much as 5 minutes for the long cycle and a minute for
the normal cycle.

Still looking for Ideas ;^)

Steve


-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]
Sent: Wednesday, August 28, 2002 4:24 PM
To: Exchange Discussions
Subject: RE: Exchange 5.5 IS disk at 100% utilization - HELP!


OK, just going by your original figures - 27g, 25g free.


-----Original Message-----
From: Sauer, Steve [mailto:[EMAIL PROTECTED]] 
Sent: Wednesday, August 28, 2002 2:49 PM
To: Exchange Discussions
Subject: RE: Exchange 5.5 IS disk at 100% utilization - HELP!


Primary partition for the "system" is on a different spindle from the IS
and log files. System, directory, log files and IS each have their own
spindles. Primary partition free space is 2.6 Gb or 66%.  The disk
utilization, % read time, is for the IS only.  All other spindles are at
or below 1%.

Steve

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]
Sent: Wednesday, August 28, 2002 3:40 PM
To: Exchange Discussions
Subject: RE: Exchange 5.5 IS disk at 100% utilization - HELP!


Only about 7% free on your primary partition?  Depending on how big your
paging file is, that's not enough free space.  Try and move some stuff
off that drive or consider more/bigger disks.



-----Original Message-----
From: Steve Sauer [mailto:[EMAIL PROTECTED]] 
Sent: Wednesday, August 28, 2002 2:33 PM
To: Exchange Discussions
Subject: Exchange 5.5 IS disk at 100% utilization - HELP!


Around 4:00 pm last night, as close as I can tell, I received a few
scattered reports that one of my Exchange servers was responding
veeeeeeeery slowly.  I took a look and didn't immediately see anything
wrong -- My Outlook was responding normally.  This morining the Helpdesk
got flooded with calls about slow response time.

I dug much deeper and didscovered that the disk containing the
Information Store was pegged at 100% utilization.  Every 25 minutes or
so the utilization drops to about 10-20% for 2-3 minutes and then pegs
again.  I have run a manual virus scan which turned up nothing, Checked
the event logs for maintenance processes still running and found
nothing, rebooted the server and the utilization returned to 100%,
Stopped the event service with no luck, stopped OWA with no luck.  This
is the first time in 5 years of running Exchange I have had something
like this.

Exchange 5.5 SP3
Win NT 4.0 SP5
Compaq 3000  Dual 600 MHz processors
        512 Mb ram
IS disk is raid 5 27 GB  25 GB used
Log disk is raid 1 8GB

CPU utilization is 15% average during peak usage 
IS has 493 MB free space after online Defrag.

Thanks in advance for your great support.

Steve Sauer
  
Senior Systems Engineer
NCI Information Systems, inc  -  Enterprise Technology Solutions Group
WIPP Site, Carlsbad, NM

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