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https://issues.apache.org/jira/browse/CASSANDRA-12876?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Per Otterström updated CASSANDRA-12876:
---------------------------------------
Attachment: 12876-2.2-v2.txt
Rebased patch and cleaned out left-overs from CASSANDRA-11752 as they are now
merged into 2.2 branch.
The patch applies cleanly on 2.2 up to trunk.
> Negative mean write latency
> ---------------------------
>
> Key: CASSANDRA-12876
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12876
> Project: Cassandra
> Issue Type: Bug
> Components: Observability
> Reporter: Kévin LOVATO
> Assignee: Per Otterström
> Fix For: 2.2.9
>
> Attachments: 12876-2.2.txt, 12876-2.2-v2.txt,
> negative_mean_details.PNG, negative_mean_periodicity.PNG, negative_mean.png,
> negative_mean_read_latency.png
>
>
> The mean write latency returned by JMX turns negative every 30 minutes. As
> the attached screenshots show, the value turns negative every 30 minutes
> after the startup of the node.
> We did not experience this behavior in 2.1.16.
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