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https://issues.apache.org/jira/browse/CASSANDRA-20547?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmitry Konstantinov updated CASSANDRA-20547:
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Component/s: Observability/Metrics
> Report Cassandra server pauses as metrics using jHiccup-like logic
> ------------------------------------------------------------------
>
> Key: CASSANDRA-20547
> URL: https://issues.apache.org/jira/browse/CASSANDRA-20547
> Project: Apache Cassandra
> Issue Type: New Feature
> Components: Observability/Metrics
> Reporter: Dmitry Konstantinov
> Assignee: Dmitry Konstantinov
> Priority: Normal
>
> During a latency issues investigation it is useful to see when JVM is paused
> by some reasons. There are JVM JMX metrics for GC but GC is not only the
> reason for pauses, it can be due to too high CPU, noisy neighbour, VM
> movement, VM over-provisioning, safepoints, etc.
> https://github.com/giltene/jHiccup agent suggest a way to measure it. The
> agent itself does not provide JMX metrics but we can repeat the same idea in
> our code, it is a simple idea: run a thread which regularly go to sleep for a
> configured time interval and then we compare the actual sleep time vs real
> time:
> https://github.com/giltene/jHiccup/blob/master/src/main/java/org/jhiccup/HiccupMeter.java#L484
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