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CONTAP-708825: Write latency from long CPs around MetroCluster aggr snapshots

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ontap-9
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core
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Issue

  • Increased write latency seen on MetroCluster nodes running ONTAP 9.16.1P9. 
  • The latency spike coincides with long WAFL consistency points (CPs), specifically due to extended durations in the P2A_BM phase. 
  • The write latency spikes to 28–60 ms on MetroCluster volumes coincident with aggregate snapshot create/delete alongside active volume snapshot schedules.

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