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Posted to oak-issues@jackrabbit.apache.org by "Alex Parvulescu (JIRA)" <ji...@apache.org> on 2016/11/23 15:26:58 UTC
[jira] [Reopened] (OAK-5058) Improve GC estimation strategy based
on both absolute size and relative percentage
[ https://issues.apache.org/jira/browse/OAK-5058?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Alex Parvulescu reopened OAK-5058:
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> Improve GC estimation strategy based on both absolute size and relative percentage
> ----------------------------------------------------------------------------------
>
> Key: OAK-5058
> URL: https://issues.apache.org/jira/browse/OAK-5058
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: segment-tar
> Affects Versions: 1.5.12
> Reporter: Andrei Dulceanu
> Assignee: Andrei Dulceanu
> Priority: Minor
> Attachments: OAK-5058-01.patch
>
>
> A better way of deciding whether GC should run or not might be by looking at the numbers computed in {{SizeDeltaGcEstimation}} from both an absolute size and relative percentage point of view. For example it would make sense to run compaction only if at least one criterion is met: "run if there is > 50% increase or more than 10GB".
> Since the absolute threshold is already implemented (see {{SegmentGCOptions.SIZE_DELTA_ESTIMATION_DEFAULT}}), it would be nice to add also something like {{SegmentGCOptions.SIZE_PERCENTAGE_ESTIMATION_DEFAULT}} and use it in making the decision.
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