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Posted to oak-issues@jackrabbit.apache.org by "Michael Dürig (JIRA)" <ji...@apache.org> on 2016/07/19 13:45:20 UTC

[jira] [Commented] (OAK-4287) Disable / remove SegmentBufferWriter#checkGCGen

    [ https://issues.apache.org/jira/browse/OAK-4287?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15384159#comment-15384159 ] 

Michael Dürig commented on OAK-4287:
------------------------------------

At http://svn.apache.org/viewvc?rev=1753387&view=rev I added a feature flag {{disable-generation-check}} for disabling this check. 

> Disable / remove SegmentBufferWriter#checkGCGen
> -----------------------------------------------
>
>                 Key: OAK-4287
>                 URL: https://issues.apache.org/jira/browse/OAK-4287
>             Project: Jackrabbit Oak
>          Issue Type: Task
>          Components: segment-tar
>            Reporter: Michael Dürig
>            Assignee: Michael Dürig
>              Labels: assertion, compaction, gc
>             Fix For: 1.6, Segment Tar 0.0.6
>
>
> {{SegmentBufferWriter#checkGCGen}} is an after the fact check for back references (see OAK-3348), logging a warning if detects any. As this check loads the segment it checks the reference for, it is somewhat expensive. We should either come up with a cheaper way for this check or remove it (at least disable it by default). 



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