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Posted to commits@cassandra.apache.org by "Corentin Chary (JIRA)" <ji...@apache.org> on 2017/03/16 12:59:41 UTC

[jira] [Created] (CASSANDRA-13338) JMX: EstimatedPartitionCount / SnapshotSize are expensive

Corentin Chary created CASSANDRA-13338:
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             Summary: JMX: EstimatedPartitionCount / SnapshotSize are expensive
                 Key: CASSANDRA-13338
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13338
             Project: Cassandra
          Issue Type: Improvement
          Components: Observability
            Reporter: Corentin Chary


EstimatedPartitionCount / EstimatedRowCount / SnapshotSize seem particularly expensive. For example on our system org.apache.cassandra.metrics:type=ColumnFamily,name=SnapshotsSize can take as much as half a second.

All this cumulated means that export stats for all your tables (with metrics-graphite or jmx_exporter) is going to take quite some time.

We should certainly try to find the most expensive end points and see if there is a way to cache some of the values.

cc: [~rgerard]



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