Michael Schurter created CASSANDRA-11404:
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Summary: Document metrics mbeans org.apache.cassandra.metrics
Key: CASSANDRA-11404
URL: https://issues.apache.org/jira/browse/CASSANDRA-11404
Project: Cassandra
Issue Type: Improvement
Components: Documentation and Website
Reporter: Michael Schurter
Was bemoaning the lack of documentation for Cassandra's extensive metrics in
IRC and [~thobbs] told me to file a ticket:
I started stealing comments from
{{src/java/org/apache/cassandra/metrics/TableMetrics.java}}:
||mbean||description||
| {{ColumnFamily.$keyspace.$table.MemtableOnHeapSize}} | Total amount of data
stored in the memtable that resides on-heap, including column related overhead
and partitions overwritten.
|
| {{ColumnFamily.$keyspace.$table.MemtableOffHeapSize}} | Total amount of data
stored in the memtable that resides off-heap, including column related overhead
and partitions overwritten. |
| {{ColumnFamily.$keyspace.$table.CompressionRatio}} | Current compression
ratio for all SSTables |
| {{ColumnFamily.$keyspace.$table.Estimated{Partition,Row}SizeHistogram}} |
Histogram of estimated partition size (in bytes). |
| {{ColumnFamily.$keyspace.$table.ReadLatency}} | Local read metrics. |
| {{ColumnFamily.$keyspace.$table.WriteLatency}} | Local Write metrics. |
| {{ColumnFamily.$keyspace.$table.MemstableLiveDataSize}} | Total amount of
live data stored in the memtable, excluding any data structure overhead. |
| {{ColumnFamily.$keyspace.$table.CoordinatorReadLatency}} | Read request
latency from the perspective of the coordinating node |
| {{ColumnFamily.$keyspace.$table.CoordinatorScanLatency}} | ??? |
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