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https://issues.apache.org/jira/browse/CASSANDRA-15392?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Blake Eggleston updated CASSANDRA-15392:
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Resolution: Won't Fix
Status: Resolved (was: Open)
Closing as won't fix due to effort involved in fixing/quantifying
MergeIterator.get performance regression relative to gc improvement for 4.0
> Pool Merge Iterators
> --------------------
>
> Key: CASSANDRA-15392
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15392
> Project: Cassandra
> Issue Type: Sub-task
> Components: Local/Compaction
> Reporter: Blake Eggleston
> Assignee: Blake Eggleston
> Priority: Normal
> Fix For: 4.0, 4.0-triage
>
>
> By pooling merge iterators, instead of creating new ones each time we need
> them, we can reduce garbage on the compaction and read paths under relevant
> workloads by ~4% in many cases.
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