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Posted to oak-issues@jackrabbit.apache.org by "Michael Dürig (JIRA)" <ji...@apache.org> on 2016/10/13 16:22:21 UTC

[jira] [Commented] (OAK-4936) Too many segment cache misses

    [ https://issues.apache.org/jira/browse/OAK-4936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15572393#comment-15572393 ] 

Michael Dürig commented on OAK-4936:
------------------------------------

[~tmueller], could you have a look into this from the LIRS cache POV? Please open an dedicated issue if required linking this one. 

> Too many segment cache misses
> -----------------------------
>
>                 Key: OAK-4936
>                 URL: https://issues.apache.org/jira/browse/OAK-4936
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>          Components: segment-tar
>            Reporter: Michael Dürig
>            Assignee: Michael Dürig
>              Labels: performance
>             Fix For: Segment Tar 0.0.16
>
>         Attachments: OAK-4936-monitoring.patch
>
>
> Running the {{ConcurrentWriteTest}} benchmark and monitoring the hits and misses of the segment cache (LIRS), I noticed that some segments are loaded over and over again (up to 3000 times). 



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