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AD/DNS server running high CPU RRS feed

  • Question

  • Hi,

    we have 2 DC on a site which are using high cpu (100%) everyday at 1pm which make server unresponding, cant login or view anything until we restart the DC and then its all ok.

    This then also effect some of the PC where dont response to anything until they are force restart or wait for DC to come to live.

    Both DC have 4 CPU, 16GB memory, lots of disk space on C drive.
    Both DC have been reboot few times
    Checked event logs and cant see anything which might show why this is happening
    Both servers are on wmware
    Server are running Server 2012 R2 (Domain/Forst Level: 2008)

    Is they anything else I can check to see why this is only happening at 1pm everyday.



    Wednesday, July 17, 2019 5:49 PM

All replies

  • Might check Task Manager|Processes for what consumes the CPU

     

     



    Regards, Dave Patrick ....
    Microsoft Certified Professional
    Microsoft MVP [Windows Server] Datacenter Management

    Disclaimer: This posting is provided "AS IS" with no warranties or guarantees, and confers no rights.

    Wednesday, July 17, 2019 6:47 PM
  • Might check Task Manager|Processes for what consumes the CPU

     

     



    Regards, Dave Patrick ....
    Microsoft Certified Professional
    Microsoft MVP [Windows Server] Datacenter Management

    Disclaimer: This posting is provided "AS IS" with no warranties or guarantees, and confers no rights.

    When its happening i'm not able to login.
    Wednesday, July 17, 2019 8:48 PM
  • When its happening i'm not able to login.

    Some things to try;

     




    Regards, Dave Patrick ....
    Microsoft Certified Professional
    Microsoft MVP [Windows Server] Datacenter Management

    Disclaimer: This posting is provided "AS IS" with no warranties or guarantees, and confers no rights.

    Wednesday, July 17, 2019 8:52 PM
  • Hello,
    Thank you for posting in our TechNet forum.

    If this question has any update or is this issue solved? Also, for the question, is there any other assistance we could provide?


    Best Regards,
    Daisy Zhou

    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Friday, July 19, 2019 9:45 AM
    Moderator
  • Do you have monitoring enabled? Do you see alerts on which process is taking CPU cycles?

    Do you have any scheduled tasks running at that time?

    You may also want to run the Performance Monitor Data Collector sets and once the CPU utilization is back to normal you can view the reports.

    Hope this helps.

    Friday, July 19, 2019 10:09 AM
  • Hi,
    I am just writing to see if this question has any update. If anything is unclear, please feel free to let us know.
    Thanks for your time and have a nice day!



    Best Regards,
    Daisy Zhou

    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Monday, July 22, 2019 11:00 AM
    Moderator
  • Hi,
    Would you please tell me how things are going on your side. If you have any questions or concerns about the information I provided, please don't hesitate to let us know.
     


    Best Regards,
    Daisy Zhou

    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.


    Thursday, July 25, 2019 7:41 AM
    Moderator
  • Sorry for late reply. We are still seeing high CPU and memory on one server now.

    When looking at the services for cpu and memory it not showing anything which should be they.

    for example high cpu and memery is use for LSASS

    Monday, July 29, 2019 11:43 AM
  • CPU and memory usage was hing on DC1 but now after the reboot of DC1 now DC2 is hsowing high CPU and memory.

    Both DC are in same site/localtion. Shouldnt these DC be blancing the load.

    Monday, July 29, 2019 1:13 PM
  •  Shouldnt these DC be blancing the load.

    That's unlikley the cause. Something here may help.

    https://support.microsoft.com/en-us/help/2550044/how-to-troubleshoot-high-lsass-exe-cpu-utilization-on-an-active-direct

    if further assistance is needed I'd suggest starting a case here with product support.

    https://support.microsoft.com/en-us/hub/4343728/support-for-business

     

     



    Regards, Dave Patrick ....
    Microsoft Certified Professional
    Microsoft MVP [Windows Server] Datacenter Management

    Disclaimer: This posting is provided "AS IS" with no warranties or guarantees, and confers no rights.

    Monday, July 29, 2019 1:17 PM