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Julian Reschke commented on OAK-3070: ------------------------------------- In the end we might need both. This change doesn't really help when the VGC hasn't run for a long time (nor not at all). The change for OAK-5704 at least guarantees that no false positive will show up again during the query for delete candidates. > Use a lower bound in VersionGC query to avoid checking unmodified once > deleted docs > ----------------------------------------------------------------------------------- > > Key: OAK-3070 > URL: https://issues.apache.org/jira/browse/OAK-3070 > Project: Jackrabbit Oak > Issue Type: Improvement > Components: mongomk, rdbmk > Reporter: Chetan Mehrotra > Assignee: Vikas Saurabh > Labels: performance > Attachments: OAK-3070.patch, OAK-3070-updated.patch, > OAK-3070-updated.patch > > > As part of OAK-3062 [~mreutegg] suggested > {quote} > As a further optimization we could also limit the lower bound of the _modified > range. The revision GC does not need to check documents with a _deletedOnce > again if they were not modified after the last successful GC run. If they > didn't change and were considered existing during the last run, then they > must still exist in the current GC run. To make this work, we'd need to > track the last successful revision GC run. > {quote} > Lowest last validated _modified can be possibly saved in settings collection > and reused for next run -- This message was sent by Atlassian JIRA (v6.3.15#6346)