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Dikang Gu updated CASSANDRA-11420: ---------------------------------- Attachment: 0001-Add-the-metrics-to-track-the-write-amplification-of-.patch patch based on trunk. > Add the JMX metrics to track the write amplification of C* > ---------------------------------------------------------- > > Key: CASSANDRA-11420 > URL: https://issues.apache.org/jira/browse/CASSANDRA-11420 > Project: Cassandra > Issue Type: Improvement > Reporter: Dikang Gu > Assignee: Dikang Gu > Priority: Minor > Fix For: 3.x > > Attachments: > 0001-Add-the-metrics-to-track-the-write-amplification-of-.patch > > > 2016-03-24_02:30:38.39936 INFO 02:30:38 Completed flushing > /data/cassandra/data/keyspace/column-family/column-family-tmp-ka-295782-Data.db > (73.266MiB) for commitlog position ReplayPosition(segmentId=1458717183630, > position=3690) > It would be useful to expose the number of flushed bytes to JMX, so that we > can monitor how many bytes are written by application and flushed to disk. > I also expose the number of bytes written by compaction to JMX, so the WA can > be calculated by dividing these two metrics -- This message was sent by Atlassian JIRA (v6.3.4#6332)