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Exchange 2013 Using very High CPU after install CU6

Posted on 2014-09-03
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Last Modified: 2016-06-13
I have an Exchange server 2013, over the weekend I have installed Cumulative Update 6. After the installation I have noticed that the CPU is stuck at 100%. When I have checked the processes there is a process noderunner.exe using large amounts of memory and CPU.

I am also experiencing intermittent connection to the Exchange server from Outlook. I do not know if this is related to the high CPU usage but if anyone has any ideas on how to troubleshoot and find a solution I appreciate your help.
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Question by:carloc
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by:Matt D
ID: 40301723
How long has this server been up and running prior to CU6?

What are the server specs?

How many mailboxes?

-Matt
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Author Comment

by:carloc
ID: 40301737
The server has was installed earlier this year. It has been active about 6 months.
We have about 400 user mailboxes and about 150 DL mailboxes.
It is 32GB, and an Intel Xenon 2,27GHz
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by:Zacharia Kurian
ID: 40303112
all exchange version starting from 2007, uses high IOPs and this led to many organizations to go with Virtual setups.

If you do not have budget constrains I would suggest you to start with VMware. Less head aches and easy management.
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Accepted Solution

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carloc earned 0 total points
ID: 40315662
Turns out the problem was related to updating Exchange 2013 to CU6. I worked with Microsoft Exchange Support to install an update they provided to fix the problem.

Thanks everyone for your comments.
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