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https://issues.apache.org/jira/browse/OAK-2110?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14301375#comment-14301375
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Julian Reschke commented on OAK-2110:
-------------------------------------
Some thoughts:
- we will probably not be able to match the version that is optimized for
Mongo, so it would be good to have a consensus what *needs* to be achieved
(this is a BG operation, right?)
- the limit on the batch size is mainly motivated by the size of the
NodeDocuments returned by query(); a variant that just returns identifiers
might help
- alternatively, we could consider a new variant of query that takes more
complex conditions (operators other than >=, plus constraints on multiple
indexed properties)
> performance issues with VersionGarbageCollector
> -----------------------------------------------
>
> Key: OAK-2110
> URL: https://issues.apache.org/jira/browse/OAK-2110
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: mongomk
> Reporter: Julian Reschke
> Fix For: 1.1.7
>
>
> This one currently special-cases Mongo. For other persistences, it
> - fetches *all* documents
> - filters by SD_TYPE
> - filters by lastmod of versions
> - deletes what remains
> This is not only inefficient but also fails with OutOfMemory for any larger
> repo.
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