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https://issues.apache.org/jira/browse/CASSANDRA-2804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13053148#comment-13053148
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Sylvain Lebresne commented on CASSANDRA-2804:
---------------------------------------------
bq. It would also be nice to have request time stats as we don't know how long
requests live in queues so it is hard to say how long clients wait to perform
an operation.
That is the goal of the values (RecentReadLatencyMicros,
TotalReadLatencyMicros, ...) exposed for each column family in the
org.apache.cassandra.db:ColumnFamilies.<keyspaceName>.<columnFamilyName> mbean.
It doesn't include any queuing, it is recorded directly in the thrift thread
accepting the request (the only thing it doesn't take into account is the small
validation we do of the request, but that's a handful of cpu cycles so it
doesn't matter).
> expose dropped messages, exceptions over JMX
> --------------------------------------------
>
> Key: CASSANDRA-2804
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2804
> Project: Cassandra
> Issue Type: Improvement
> Components: Tools
> Reporter: Jonathan Ellis
> Assignee: Jonathan Ellis
> Priority: Minor
> Fix For: 0.8.2
>
>
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