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From "Marcel Reutegger (JIRA)" <j...@apache.org>
Subject [jira] [Created] (OAK-8185) Improve CompositeNodeStore performance
Date Mon, 01 Apr 2019 08:02:00 GMT
Marcel Reutegger created OAK-8185:
-------------------------------------

             Summary: Improve CompositeNodeStore performance
                 Key: OAK-8185
                 URL: https://issues.apache.org/jira/browse/OAK-8185
             Project: Jackrabbit Oak
          Issue Type: Improvement
          Components: store-composite
            Reporter: Marcel Reutegger


While working on OAK-8141 I noticed the benchmark numbers for GetDeepNodeTest on Oak-Store-Composite
are rather low compared to Oak-Segment-Tar.
{noformat}
Apache Jackrabbit Oak 1.12-SNAPSHOT
# GetDeepNodeTest                  C     min     10%     50%     90%     max       N 
Oak-Segment-Tar                    1      35      37      39      41      64    1524
Oak-Composite-Store                1     203     204     208     214     236     288
{noformat}
In an offline conversion [~tomek.rekawek] mentioned the overhead shouldn't be that big because
the implementation should switch to the non-composite implementation as soon as the read operation
traverses into the global/writable node store. It seems however, this is not the case  when
running GetDeepNodeTest. So, this may well be a bug and not an improvement, as filed at the
moment.



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