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Microsoft SQL Disk overwhelmed high response times

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Category:
ontap-9
Specialty:
perf
Last Updated:

Applies to

Microsoft SQL

Any version of ONTAP or Data ONTAP

Issue

  • Running SQL performance metrics, Avg Disk Queue Length is over 1
  • An error may be reported in the running SQL logs: Disk overwhelmed: Avg Disk Queue Length is greater than 1 and response times are greater than 25 ms for IO sizes of 64 KB or smaller or 35 ms for IO sizes greater than 64 KB.

 

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