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https://issues.apache.org/jira/browse/OAK-2546?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14359426#comment-14359426
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Stefan Egli commented on OAK-2546:
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Created follow-up idea 'dynamic cache allocation' in OAK-2622
> allow configuring subcaches of documentnodestore individually
> -------------------------------------------------------------
>
> Key: OAK-2546
> URL: https://issues.apache.org/jira/browse/OAK-2546
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: mongomk
> Affects Versions: 1.0.11, 1.1.6
> Reporter: Stefan Egli
> Assignee: Marcel Reutegger
> Fix For: 1.0.12, 1.1.7
>
>
> Currently there's one config for the DocumentNodeStore's (actually
> DocumentMk) caches (Documents, Diff, DocChildren, NodeChildren, NodeState) as
> a whole, and it distributes to each of those subcaches in a [hard-coded
> way|https://github.com/apache/jackrabbit-oak/blob/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentMK.java#L732].
> It would be good to be able to configure the individual sub-caches
> individually (be it in percentage or absolute)
> The reason I bring this up is where I think it might be useful to try out
> giving the NodeChildren relatively more cache as it turned out during a
> heavy-load test that observation queues were starting to grow at the same
> point in time when the NodeChildren cache started to perform badly. While the
> problem there is relative bad performance of one or a few observation
> listeners, it could nevertheless help bridge a situation when the
> NodeChildren cache contains a longer 'history' so that the slow listener
> could catch up.
> PS: Leaving it up to discussion as to whether this goes into 1.0 branch or not
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