Exchange 2007 Performance

coolsport00
coolsport00 used Ask the Experts™
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For about 2wks our 'snmp/ping notification' software has alerted me to issues with my Exchange 2K7 U3 server, which is a VM running on ESX 4.0U2. The notification software is IPCheck, in case any of you all are familiar with it. We configure "ping" and "snmp" sensors. Ping sensors are just that..to report on the VM being down (or unresponsive for a prolonged period and unable to respond to pings). The snmp sensors monitor disk usage so we can be alerted when data volumes are running low.

Anyway, around 8-10pm, when backups run against Exchg (Avamar B/U), CPU runs high. According to vSphere Performance, the VM only runs about 70% utilization, but within the guest, it's max'd out (100%). I have 8GB RAM and 2 vCPUs config'd for this VM and, to be honest, only having around 220 users, with minimal mailbox storage (limits ARE imposed), those specs seems a bit high to me.

Sometimes IPCheck messes up and the sensors need re-done. (not sure why that is...just an old pgm actually) I did re-do the sensors, but still am getting notifications. I do also notice OWA somewhat unresponsive during the 8-10pm timeframe as well. And even during the day my Outlook 2010 client is sporadically unresponsive.

So, my question is this - how can I best config my Exchg VM so CPU doesn't run so high. My assumption is that it is semi-unresponsive during this B/U window and not really "down". If I can get my VM config'd so CPU doesn't run so high I'm thinking that would mitigate this, not sure. On the other hand, I don't really want to config this VM with a bunch of resources it doesn't need 85% of the time, even though I do have plenty of resources to give it. Any suggestions are appreciated. FYI - vSphere/VM performance monitoring/testing is not a strong suit of mine :)

Thanks.

~coolsport00
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Consider upgrading to vSphere 4.1u2
We've seen major performance increases in some cases.

Also experiment by giving the VM more RAM.
Top Expert 2010

Author

Commented:
It did have 6GB & I bumped it up to 8GB. 4.1 won't be viable for me till 3rd Qtr this yr unfortunately :/
Knowing which process is running at 100% maybe could be useful at solving the problem.
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Top Expert 2010

Author

Commented:
It's "store.exe" that's doing most of the activity...well, actually, that's during the day. Let me see if I can check it tonite. My guess is 'avp.exe', which is the Avamar backup process....
Top Expert 2010
Commented:
Sorry for the very late/delayed response to this. Forgot this was even here! :) I ended up finding out what my latency issue was. My Exchg server is a VM. I back it up and repicate it offiste regularly - daily, to be exact. After 1 of those jobs ran, the snapshot it created never got removed upon b/u or repl job completion. As such, it 'bogged' down my Exchg VM extremely so since the snap had been there for over a month (if I recall). Anyway, once I removed the snapshot, which was actually a chore to do...didn't remove cleanly....all was then well performance-wise again.

Thanks everyone.

~coolsport00
Top Expert 2010

Author

Commented:
Resolved this issue on my own.

~coolsport00

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