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High CPU utilization on storage nodes due to high number of delete markers

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storagegrid
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sgrid
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Applies to

StorageGRID

Issue

  • High CPU utilization on storage nodes due to high number of delete markers showing on the Cassandra service.
  • Cassandra deleted data errors in diagosntics page. 
    • Cassandra will fail queries that encounter more than a certain number of deleted rows. 
    • Some operations will fail until the deleted rows are automatically cleaned up by the auto-compactor. 
  • You can monitor the tombstone errors in prometheus using the query: 
    • sum_over_time(storagegrid_private_cassandra_tombstone_error[1d])

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