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Second exch 2010 server in DAG has cpu running at 100%

We have  servers exch 2010 running in a DAG which have been running fine for about 8-10 months. Just recently one of the servers in the DAG is ruinning very slow and its cpu is running at 100% all the time.
Any idea what I can check?
I ran perfmon but the does not seem to be any processes that are running very high cpu
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vmich
Asked:
vmich
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1 Solution
 
SebastianAbbinantiCommented:
Run task manage and look at the processes. Check to see what process has the highest CPU percentage. Is it an exchange service?

Thanks,
S.
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
Which Process is taking the Max ?
What do you see in Task Manager ?
Do you have a AV or any recent upgrades done ? does it has the exclusions set ?
How many DB's do you have in total and how many are owned by this DAG node ?

- Rancy
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vmichAuthor Commented:
Nothing is showin of any use in the event viewer or perfmon services.
If I suspend the replication to the server, then the cpu goes back to normal. I did stop the replication on the 3 db's and then enabled one at a time a ran the get-mailboxdatabasestatuscopy and kept hitting the up arrow every so often last nigh untill all of the replay queue lengths were down to 0 and then the cpu seem fine. But them today it is going to 100% once again
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SebastianAbbinantiCommented:
You need to check task manager to see what's bring it to 100%. Just go into task manager, select the processes tab, and sort by CPU. What ever is at the top is causing the issue.

Thanks,
S.
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
How many DB's do you have being Replicated to that server ?
Does it hold any active copies or just the Passive ?
Which Database creates the Max log files ?
Did you check EventID for any events for Replication or Errors ?

- Rancy
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vmichAuthor Commented:
As I mentined above, once I suspend the replication, the cpu goes back to normal. 3 db's are being replicated and they are very large. Each one is nearing 1TB. The client has not limits on their users, which stinks...
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vmichAuthor Commented:
As soon as I resume one of the replications to one of the 3 db's, the cpu goes to 100% and the only ones I see in perfmon using up the cpu a lot is the msexchangerepl.exe and the store.exe
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
Who is the Active server for DB's ?
What is the amount of Logs replicated everyday ?
When does the backup happen and on which node ?
Do we have any AV if so are the exclusions set ?

- Rancy
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vmichAuthor Commented:
The active server is the other server which is not having the issue.
Not sure on the amount of logs everyday
The backuso run at night and on the active server not the passive server which is havng the cpu issue.
The anti virus software was removed early yesterday.
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
Exchange Virus Scanning API has low thread count
http://technet.microsoft.com/en-us/library/aa997059%28v=EXCHG.80%29.aspx

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MSExchangeIS\VirusScan
Enabled - 0 (this should be set to 0 and not 1)

How many logs are created everyday and what is the bandwidth between both the nodes.

- Rancy
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vmichAuthor Commented:
The issue had to do with the size of the databases. They are all around 1TB and the replication queue length for the logs was just so large that it was causing the resources to get chewed up badly..
They are currently moving users to other smaller databases and once that is complete, we will start up the replication again to the passive node.
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vmichAuthor Commented:
Large databases 1TB
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