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Receiving "wafl.memory.statusVeryLowMemory" alerts during SnapMirror Jobs

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Category:
ontap-9
Specialty:
Perf
Last Updated:

Applies to

  • ONTAP 9
  • SnapMirror

Issue

  • Multiple WAFL is running very low on memory events can be seen in AutoSupport and in the output of event log show command
  • Alerts occur at the same minute of the hour

Cluster1::> event log show
Time                Node             Severity      Event
------------------- ---------------- ------------- ---------------------------
6/17/2022 02:10:39  Cluster1-01      ALERT         wafl.memory.statusVeryLowMemory: WAFL is running very low on memory, with 854MB remaining.
6/17/2022 01:10:37  Cluster1-01      ALERT         wafl.memory.statusVeryLowMemory: WAFL is running very low on memory, with 891MB remaining.

  • The command  qos statistics volume resource cpu show  output shows CPU is highest for the workload _SNAPMIRROR
Cluster1::> qos statistics workload resource cpu show
 -node nodeB
Workload               ID   CPU
------------------ ------ -----
-total- (100%)          -   90%
User-Default            -   10%
_SNAPMIRROR             -   72%
_Efficiency_BestEffort  -    8%

 

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