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https://issues.apache.org/jira/browse/PHOENIX-7501?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stephen Yuan Jiang reassigned PHOENIX-7501:
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Assignee: Tanuj Khurana
> GC issues in TTLRegionScanner when gap is more than TTL
> -------------------------------------------------------
>
> Key: PHOENIX-7501
> URL: https://issues.apache.org/jira/browse/PHOENIX-7501
> Project: Phoenix
> Issue Type: Bug
> Affects Versions: 5.2.0, 5.2.1
> Reporter: Tanuj Khurana
> Assignee: Tanuj Khurana
> Priority: Major
>
> TTLRegionScanner masks the expired rows before compaction purges the expired
> rows. The masking logic calculates the max and min timestamp of the latest
> cells of the row and if the difference between max and min is greater than
> TTL it does a gap analysis. In the gap analysis it does a raw scan and
> fetches all the versions of the row. In our production, we saw this gap
> analysis causing long GC pauses when the row has many versions.
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