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High CPU utilization due to branch-cache feature

Views:
39
Visibility:
Public
Votes:
0
Category:
ontap-9
Specialty:
perf
Last Updated:

Applies to

  • ONTAP 9
  • CIFS/SMB
  • BranchCache

Issue

  • CPU utilization is high
  • HOST OS is the busiest CPU domain domain
    Example:

     cluster::> set diag
cluster::*> node run cluster-2a sysstat -c 20 -M 1

  • Hashd is consuming the CPU host domain
    Example:

    cluster::> set advanced
    cluster::*> node run -node cluster-2a ps -z

    Wait for 1 minute
    cluster::*> node run -node cluster-2a ps
    Process statistics over 58.471 seconds...
       ID State Domain   LastRan_ms        %CPU     StackUsed      %StackUsed     Name
     3639 FB    o            298425         99%             0            100%     hashd
     3640 FB    o          90459243         98%             0            100%     hashd
     3641 FB    o          90459243         99%             0            100%     hashd
     3642 FB    o          90459243         99%             0            100%     hashd
     3643 FB    o          90459243          0%             0            100%     hashd
     3644 FB    o           2098312          0%             0            100%     hashd
     3645 FB    o          90459242          0%             0            100%     hashd
     3646 FB    o           3928472          0%             0            100%     hashd

 

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