Apache Cassandra™ 2.0

Compaction metrics

Monitoring compaction performance is an important aspect of knowing when to add capacity to your cluster. The following attributes are exposed through CompactionManagerMBean:
Compaction Metrics
Attribute Description
CompletedTasks Number of completed compactions since the last start of this Cassandra instance
PendingTasks Number of estimated tasks remaining to perform
ColumnFamilyInProgress The table currently being compacted. This attribute is null if no compactions are in progress.
BytesTotalInProgress Total number of data bytes (index and filter are not included) being compacted. This attribute is null if no compactions are in progress.
BytesCompacted The progress of the current compaction. This attribute is null if no compactions are in progress.
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