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https://issues.apache.org/jira/browse/GEODE-10087?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17514618#comment-17514618
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ASF subversion and git services commented on GEODE-10087:
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Commit a350ed22d912bee409e62fda3770dba91631d7a3 in geode's branch
refs/heads/develop from Alberto Gomez
[ https://gitbox.apache.org/repos/asf?p=geode.git;h=a350ed2 ]
GEODE-10087: Enhance off-heap fragmentation visibility. (#7407)
* GEODE-10087: Enhance off-heap fragmentation visibility.
As per RFC
https://cwiki.apache.org/confluence/display/GEODE/Enhance+Off-heap+memory+fragmentation+visibility
Geode's off-heap fragmentation visibility has been improved
by adding a new stat: freedChunks as well as
by the periodic update of the largestFragment stat.
The new one stat will also be periodically updated
with a default frequency of one hour that can be changed by the
update-off-heap-stats-frequency-ms system property.
Besides, the new stat and the largestFragment stat
will be published via JMX.
* GEODE-10087: Update after review
* GEODE-10087: Rename method after review
> Enhance Off-heap memory fragmentation visibility
> -------------------------------------------------
>
> Key: GEODE-10087
> URL: https://issues.apache.org/jira/browse/GEODE-10087
> Project: Geode
> Issue Type: Improvement
> Components: offheap, statistics
> Reporter: Alberto Gomez
> Assignee: Alberto Gomez
> Priority: Major
> Labels: pull-request-available
>
> As pointed out in
> https://cwiki.apache.org/confluence/display/GEODE/Enhance+Off-heap+memory+fragmentation+visibility:
> "Even though Geode offers several stats related to the status of the off-heap
> memory area ({_}usedMemory{_}, {_}freeMemory{_}, {_}fragmentation{_},
> _largestFragment_ and {_}fragments{_}), the ones that provide information
> about the level of the fragmentation of the off-heap memory
> ({_}fragmentation{_}, _largestFragment_ and {_}fragments{_}) are only updated
> when defragmentation is executed."
> The visibility of the off-heap memory fragmentation status must be made more
> visible as proposed in the above RFC by means of:
> * Updating the largestFragment stat periodically.
> * Adding a new off-heap stat called "freedChunks" that will provide the
> number of elements in the tiny and huge lists. This stat will be periodically
> updated.
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