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https://issues.apache.org/jira/browse/OAK-6915?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16247543#comment-16247543
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Andrei Dulceanu commented on OAK-6915:
--------------------------------------
[~frm], patch LGTM now. Below, the results obtained with the patch applied for
{{BasicWriteTest}}:
{{Oak-6915-04.patch}}:
{noformat}
# BasicWriteTest C min 10% 50% 90% max
N
Oak-Segment-Tar 1 20 21 23 28 126
2367
Oak-Segment-Tar-Cold 1 58 62 66 77 217
853
{noformat}
> 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-6915-03.patch,
> OAK-6915-04.patch, OAK-6915-diagnostics-02.patch, OAK-6915-diagnostics.patch,
> OAK-6915.patch, Screen Shot 2017-11-09 at 14.14.28.png, Screen Shot
> 2017-11-09 at 14.16.59.png
>
>
> 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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