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https://issues.apache.org/jira/browse/OAK-2557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14352714#comment-14352714
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Chetan Mehrotra commented on OAK-2557:
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bq. Is that set becoming too large to cause an OOM
Indeed thats the case. The array list had 12M entries taking 3 GB of space. So
GC logic should do the deletion in in between
> VersionGC uses way too much memory if there is a large pile of garbage
> ----------------------------------------------------------------------
>
> Key: OAK-2557
> URL: https://issues.apache.org/jira/browse/OAK-2557
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: core, mongomk
> Affects Versions: 1.0.11
> Reporter: Stefan Egli
> Priority: Blocker
> Fix For: 1.2, 1.0.13
>
>
> It has been noticed that on a system where revision-gc
> (VersionGarbageCollector of mongomk) did not run for a few days (due to not
> interfering with some tests/large bulk operations) that there was such a
> large pile of garbage accumulating, that the following code
> {code}
> VersionGarbageCollector.collectDeletedDocuments
> {code}
> in the for loop, creates such a large list of NodeDocuments to delete
> (docIdsToDelete) that it uses up too much memory, causing the JVM's GC to
> constantly spin in Full-GCs.
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