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https://issues.apache.org/jira/browse/GEODE-6424?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16773519#comment-16773519
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ASF subversion and git services commented on GEODE-6424:
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Commit 6f74c38882a108df365c1735db06a81825979157 in geode's branch
refs/heads/release/1.9.0 from Jacob Barrett
[ https://gitbox.apache.org/repos/asf?p=geode.git;h=6f74c38 ]
GEODE-6424: Fixes spotless
> Reduce overhead of stats storage
> --------------------------------
>
> Key: GEODE-6424
> URL: https://issues.apache.org/jira/browse/GEODE-6424
> Project: Geode
> Issue Type: Improvement
> Components: statistics
> Reporter: Jacob S. Barrett
> Priority: Major
> Fix For: 1.9.0, 1.10.0
>
> Attachments: 32-thread.png, image.png
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> The current stats storage system is based on a very old and complicated
> implementation of a thread striped counter. See {{Atomic50StatisticsImpl}}.
> This implementation makes now incorrect assumptions about certain performance
> characteristics of volatile memory access. Combined with it's complexity it
> is causing large variances in performance numbers on the function benchmarks.
> Runs can differ by as much as 45%.
> Replace this implementation with one based on the Java 8 {{LongAdder}}, which
> is a modern and JDK maintained implementation of a striped counter. Also use
> {{DoubleAdder}} to support doubles, which the {{Atomic50StatisticsImpl}} does
> not support.
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