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https://issues.apache.org/jira/browse/OAK-2713?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Davide Giannella closed OAK-2713.
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Bulk Close for 1.3.0
> High memory usage of CompactionMap
> ----------------------------------
>
> Key: OAK-2713
> URL: https://issues.apache.org/jira/browse/OAK-2713
> Project: Jackrabbit Oak
> Issue Type: Sub-task
> Components: segmentmk
> Reporter: Michael Dürig
> Assignee: Michael Dürig
> Labels: compaction, gc, resilience
> Fix For: 1.3.0
>
>
> In environments with a lot of volatile content the {{CompactionMap}} can end
> up eating a lot of memory. From
> {{CompactionStrategyMBean#getCompactionMapStats}}:
> {noformat}
> [Estimated Weight: 317,5 MB, Records: 39500094, Segments: 36698],
> [Estimated Weight: 316,4 MB, Records: 39374593, Segments: 36660],
> [Estimated Weight: 315,4 MB, Records: 39253205, Segments: 36620],
> [Estimated Weight: 315,1 MB, Records: 39221882, Segments: 36614],
> [Estimated Weight: 314,9 MB, Records: 39195490, Segments: 36604],
> [Estimated Weight: 315,0 MB, Records: 39182753, Segments: 36602],
> [Estimated Weight: 360 B, Records: 0, Segments: 0],
> {noformat}
> This causes compaction to be skipped:
> {noformat}
> 2015-03-30:30.03.2015 02:00:00.038 *INFO* [] [TarMK compaction thread
> [/foo/bar/crx-quickstart/repository/segmentstore], active since Mon Mar 30
> 02:00:00 CEST 2015, previous max duration 3854982ms]
> org.apache.jackrabbit.oak.plugins.segment.file.FileStore Not enough available
> memory 5,5 GB, needed 6,3 GB, last merge delta 1,3 GB, so skipping compaction
> for now
> {noformat}
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