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https://issues.apache.org/jira/browse/GEODE-3148?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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nabarun reopened GEODE-3148:
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> Replace ObjectOpenCustomHashSet with ConcurrentSkipListSet
> ----------------------------------------------------------
>
> Key: GEODE-3148
> URL: https://issues.apache.org/jira/browse/GEODE-3148
> Project: Geode
> Issue Type: Bug
> Components: querying
> Reporter: nabarun
>
> After profiling the performance of queries such as SELECT DISTINCT e.id,
> e.value FROM /region e, we could see that the bottleneck was caused by rehash
> / resizing operation of the ObjectOpenCustomHashSet while adding new entries
> to the data structure.
> We experimented with ConcurrentSkipListSet and saw that performance was
> improved. ConcurrentSkipListSet should be incorporated into Apache Geode if
> it passes all the testing.
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