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https://issues.apache.org/jira/browse/HBASE-26731?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bryan Beaudreault updated HBASE-26731:
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Labels: patch-available (was: )
> Metrics for tracking of active scanners
> ---------------------------------------
>
> Key: HBASE-26731
> URL: https://issues.apache.org/jira/browse/HBASE-26731
> Project: HBase
> Issue Type: Improvement
> Reporter: Bryan Beaudreault
> Assignee: Bryan Beaudreault
> Priority: Minor
> Labels: patch-available
>
> Active scanners take up resources on the RegionServer. This can result in GC
> issues or even OOMs in cases of leaked scanners. It'd be helpful to have
> metrics for tracking scanners. I was thinking of three:
> * activeScanners - a gauge, showing the number of active scanners at a point
> in time
> * scannerLeaseExpirations - a counter of lease expirations
> * scannerOldestLeastAge - a gauge with the age of the oldest least
> The first one would be incremented and decremented as scanners are opened and
> closed. The last two would be integrated into the LeaseManager's run loop.
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