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https://issues.apache.org/jira/browse/CASSANDRA-14436?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16569004#comment-16569004
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ASF GitHub Bot commented on CASSANDRA-14436:
--------------------------------------------
Github user dineshjoshi commented on a diff in the pull request:
https://github.com/apache/cassandra/pull/244#discussion_r207697244
--- Diff: src/java/org/apache/cassandra/db/ReadExecutionController.java ---
@@ -113,6 +123,11 @@ static ReadExecutionController forCommand(ReadCommand
command)
throw e;
}
}
+ if (baseCfs.metric.topLocalReadQueryTime.isEnabled())
+ {
+ result.startTime = System.nanoTime();
--- End diff --
I prefer naming primitive variables with units for example -
`startTimeNanos`.
> Add sampler for query time and expose with nodetool
> ---------------------------------------------------
>
> Key: CASSANDRA-14436
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14436
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Chris Lohfink
> Assignee: Chris Lohfink
> Priority: Major
>
> Create a new {{nodetool profileload}} that functions just like toppartitions
> but with more data, returning the slowest local reads and writes on the host
> during a given duration and highest frequency touched partitions (same as
> {{nodetool toppartitions}}). Refactor included to extend use of the sampler
> for uses outside of top frequency (max instead of total sample values).
> Future work to this is to include top cpu and allocations by query and
> possibly tasks/cpu/allocations by stage during time window.
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