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From "Andrei Dulceanu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (OAK-6915) Minimize the amount of uncached segment reads
Date Wed, 08 Nov 2017 15:06:00 GMT

    [ https://issues.apache.org/jira/browse/OAK-6915?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16244107#comment-16244107
] 

Andrei Dulceanu commented on OAK-6915:
--------------------------------------

bq. Regardless the numbers for {{Oak-Segment-Tar-Cold}}, the patch seems to match or improve
the statistics for the other fixtures.
True, but still the gain for {{Oak-Segment-Tar-Cold}} is impressive. Nice work!

> Minimize the amount of uncached segment reads
> ---------------------------------------------
>
>                 Key: OAK-6915
>                 URL: https://issues.apache.org/jira/browse/OAK-6915
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: segment-tar
>            Reporter: Francesco Mari
>            Assignee: Francesco Mari
>             Fix For: 1.8, 1.7.12
>
>         Attachments: OAK-6915-01.patch, OAK-6915-02.patch, OAK-6915-diagnostics.patch
>
>
> The current implementation of {{SegmentCache}} should make better use of the underlying
Guava cache by relying on the cached segments instead of unconditionally performing an uncached
segment read via the {{Callable<Segment>}} passed to {{SegmentCache#getSegment}}.



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