High CPU Usage

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  Hi.

  I think need analize mailbox with high latency.

  High CPU Usage in Exchange User Monitor Tool and High RPC Average Latency in Exchange 2007, How to Fix and How We Did It?

  Maybe external user connection from mobile devices and need update os. Sometime old iOS or Android can spoofing when connection to Exchange.

  Maybe your are need analize your configuration Understanding Processor Configurations and Exchange Performance

  Troubleshooting High CPU Utilization

  Maybe you are need install update Exchange and Outlook.

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  MCITP, MCSE. Regards, Oleg

  • Edited by Oleg.Kovalenko Tuesday, July 12, 2016 5:06 PM

  Tuesday, July 12, 2016 5:05 PM
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  It's not individual mailbox.   It is across the board on all six mailbox servers.  CPU are at under 20% most of time except during 12:30am to 1:am.

  Tuesday, July 12, 2016 5:37 PM
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  Maybe you are runing backup, services DB or services on the storage at this time.

  ---

  MCITP, MCSE. Regards, Oleg

  • Edited by Oleg.Kovalenko Tuesday, July 12, 2016 6:35 PM

  Tuesday, July 12, 2016 6:33 PM
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  Nope, backup was not running.

  Tuesday, July 12, 2016 9:56 PM
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  One more option I would suggest you trying this Exchange server health check tool which empowers to track the health status of your Exchange Environment and alerts instantly for critical by sending customized email notification for high CPU utilization, disk space and much more.

  Wednesday, July 13, 2016 6:45 AM
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  Hi,

  Perfmon is also a good tool to troubleshoot the performance issues.

  https://blogs.technet.microsoft.com/mikelag/2010/01/11/perfwiz-for-exchange-2010/

  Some standard of performance counters please refer to the following article:

  https://technet.microsoft.com/en-us/library/dd335215(v=exchg.141).aspx

  Best regards,

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  • Edited by Jason.Chao Wednesday, July 13, 2016 11:04 AM
  • Proposed as answer by Niko.Cheng Monday, July 25, 2016 1:30 AM
  • Marked as answer by Niko.Cheng Monday, July 25, 2016 1:30 AM

  Wednesday, July 13, 2016 11:02 AM
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  Do you have custom maintenance schedules on your databases or are they set to 24x7? 

  Check the server OS and make sure the server isn't setup for indexing the file system.

  What antivirus are you running on the mailbox servers?  It could be a quick scan or file system scan that's set to go off during that time.  It could also be a virus definition update/quick scan after the update depending on how that is scheduled in your environment.  We had this problem with Symantec Endpoint and wound up having to go to another antivirus product because it was so bad and was killing our mailbox servers.

  Wednesday, July 13, 2016 12:47 PM
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  My initial bet will be on AV as well.  Ensure that it is correctly configured.

  You can use PAL to help analyse the Perfmon data you are collecting.

  https://blogs.technet.microsoft.com/rmilne/2012/07/19/using-a-pal-template-to-easily-capture-performance-data/

  ---

  Cheers,

  Rhoderick

  Microsoft Senior Exchange PFE

  Blog: http://blogs.technet.com/rmilne  Twitter:   LinkedIn:   Facebook:   XING:

  Note: Posts are provided “AS IS” without warranty of any kind, either expressed or implied, including but not limited to the implied warranties of merchantability and/or fitness for a particular purpose.

  • Proposed as answer by Jason.Chao Saturday, July 23, 2016 3:43 PM
  • Marked as answer by Niko.Cheng Monday, July 25, 2016 1:30 AM

  Wednesday, July 13, 2016 8:16 PM