Question about perfmon stats. I've read that I/O stats should be
compared against the number of spindles in your logical disk (LUN on a
Clariion CX400) and that avg disk queue should not exceed the number of
spindles. So, for example, an avg queue of 4 in a 8 disk RAID5 would be
acceptable.
To: MS-Exchange Admin Issues
>
> Subject: Re: Sluggish performance of Mail Store, Server sitting mostly idle
>
> Disk IO. Check your disk IO. If it is above 50 ms then you are toast
> and you will have end users get the 'waiting on exchange server'
> pop-ups. Excha
The switch fabric is running at 4Gbps.
I didn't check the switch utilities for usage during peak times, I was
seriously just looking at the server.
If it starts up again I'll be looking there as well.
We have a complete redundant path to the SPs on the Clariion for each host, and
we are not lo
Only if it's sustained above 50ms is it an issue.
Spikes are ok.
-Original Message-
From: Steven Peck [mailto:[EMAIL PROTECTED]
Sent: Monday, February 11, 2008 5:25 PM
To: MS-Exchange Admin Issues
Subject: Re: Sluggish performance of Mail Store, Server sitting mostly idle
Di
Disk IO. Check your disk IO. If it is above 50 ms then you are toast
and you will have end users get the 'waiting on exchange server'
pop-ups. Exchange Best Practices analyzer can help you spot this.
We have this issue currently using a Hitachi SAN. A major in house
project went live recently
Sean,
I'll check the boot.ini switches hadn't thought of that yet.
As for using Diskpart, yes I partitioned those disks following my initial setup
SAs instructions very carefully.
As for the dedicated spindles... we didn't have any way to determine the
"damage" that was going to be done by the
Yuckyou definitely want to dedicate spindles to your Exchange server if
at all possible. Sounds like you may have identified the performance
problem.
We're running our Exchange server off a similiar setup as yours (CX700,
switched fabric, etc.) Did you partition your Exchange LUNs using Diskp
Ok, I've got a lot to do and sort through.
Also the comments about the SAN volumes causing my issue... they may be closer
than I initially thought.
One of our other production systems is sharing the disks that my Exchange LUN
is living on... that users on that system have been running processes
Sent: Monday, February 11, 2008 9:57 AM
To: MS-Exchange Admin Issues
Subject: RE: Sluggish performance of Mail Store, Server sitting mostly idle
A little deeper and the Queue length is all in the disk the store is on...
Hm...
I think I want to run a longer snapshot to look at this.
Say a coup
:[EMAIL PROTECTED]
Sent: Monday, February 11, 2008 9:54 AM
To: MS-Exchange Admin Issues
Subject: RE: Sluggish performance of Mail Store, Server sitting mostly idle
Michael,
Quick look at the permon (running real time) and I think you've picked up on
something.
Avg Disk Queue is about 1.1
Page
2008 15:20
To: MS-Exchange Admin Issues
Subject: RE: Sluggish performance of Mail Store, Server sitting mostly idle
Matt,
FC San.
EMC Clariion CX3-20C
4Gb switched infrastructure
4Gb 146GB 15k Disks
RAID 10
The disk should by no means be the bottleneck.
I'll check out the suggested link
Matt,
FC San.
EMC Clariion CX3-20C
4Gb switched infrastructure
4Gb 146GB 15k Disks
RAID 10
The disk should by no means be the bottleneck.
I'll check out the suggested link and tools.
~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~
~ http://www.sunbeltsoftware.co
Mine's a 2850 and has Intel NICs... figures it wouldn't be THAT easy LOL.
I've been working with newer servers lately that's why my jump to Broadcoms was
so quick...
Thanks for the info, and I'll watch for that when I apply SP2 to the server for
sure.
I'm still going to look for updated driver
e of Mail Store, Server sitting mostly idle
A little deeper and the Queue length is all in the disk the store is on...
Hm...
I think I want to run a longer snapshot to look at this.
Say a couple of hours.
Any suggestions about how to correct the Disk Queue time, or is that a hardware
/ ve
Subject: RE: Sluggish performance of Mail Store, Server sitting mostly idle
Bob,
I'm going to look at that VERY carefully.
Dell Servers = Broadcom NICs
Since those are specifically mentioned
I will report back.
By the way, have I ever said how much this list makes Exchange easier? You
Bob,
I'm going to look at that VERY carefully.
Dell Servers = Broadcom NICs
Since those are specifically mentioned
I will report back.
By the way, have I ever said how much this list makes Exchange easier? You
guys are just plain awesome!
~ Ninja Email Security with Cloudmark Spam Engine
ormance of Mail Store, Server sitting mostly
idle
A little deeper and the Queue length is all in the disk the store is
on...
Hm...
I think I want to run a longer snapshot to look at this.
Say a couple of hours.
Any suggestions about how to correct the Disk Queue time, or is that a
hardware / vendo
I had the same thing happen a few months ago. Turned out to be the IP Chimney
/ RSS issue.
http://theessentialexchange.com/blogs/michael/archive/2008/01/03/more-issues-with-the-windows-server-2003-scalable-networking-pack.aspx
(Watch for wrappage in the link)
Bob Fronk
-Original Message
A little deeper and the Queue length is all in the disk the store is on...
Hm...
I think I want to run a longer snapshot to look at this.
Say a couple of hours.
Any suggestions about how to correct the Disk Queue time, or is that a hardware
/ vendor specific type question?
Haven't ever dug th
Michael,
Quick look at the permon (running real time) and I think you've picked up on
something.
Avg Disk Queue is about 1.1
Pages/Sec avg has run as high as 35 and as low as 11.
Looks like I may need to do some performance tweaks perhaps?
~ Ninja Email Security with Cloudmark Spam Engine Gets
Like the other guys said - first thing I'd take a look at is the network.
But the second thing - start perfmon on that Exchange server. Is the disk queue
averaging over 1? Is paging averaging over 20? Is the processor averaging over
70%?
Any of these could be causing the issue as well...
Regar
AV = Symantec... I'll check for updates there.
The switch and server are set to auto-negotiate, and they're both capable of
1Gbps. I'll look at specifying the 1Gb Full on both sides of that link and see
what happens.
Thanks for the ideas so far.
~ Ninja Email Security with Cloudmark Spam Engin
Trend as your AV perhaps? This happened when we brought a new server online.
I don't recall the exact details but an update from Trend fixed the problem.
-Original Message-
From: Robb Pickinpaugh [mailto:[EMAIL PROTECTED]
Sent: Monday, February 11, 2008 8:03 AM
To: MS-Exchange Admin Is
: MS-Exchange Admin Issues
Subject: re: Sluggish performance of Mail Store, Server sitting mostly idle
Also another tibit.
The server is sitting at 2.45GB of RAM in use, and the processors never exceed
10% usage.
Hence the confusion, I would understand the behavior if the server was
overloaded
Are you running any kind of anti-virus on the Exchange server? Did this
start happening after an update?
-Original Message-
From: Robb Pickinpaugh [mailto:[EMAIL PROTECTED]
Sent: Monday, February 11, 2008 8:03 AM
To: MS-Exchange Admin Issues
Subject: Sluggish performance of Mail Store,
Sounds like network.
Any changes to the adapter or switch port settings?
-Original Message-
From: Robb Pickinpaugh [mailto:[EMAIL PROTECTED]
Sent: Monday, February 11, 2008 8:21 AM
To: MS-Exchange Admin Issues
Subject: re: Sluggish performance of Mail Store, Server sitting mostly
idle
Also another tibit.
The server is sitting at 2.45GB of RAM in use, and the processors never exceed
10% usage.
Hence the confusion, I would understand the behavior if the server was
overloaded, but it's practically doing nothing.
~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam
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