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https://issues.apache.org/jira/browse/CASSANDRA-14416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16469280#comment-16469280
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Sam Tunnicliffe commented on CASSANDRA-14416:
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[~jjirsa] I just committed the dtest fix (for CASSANDRA-14420), so you might
want to re-run CI now.
> Remove string formatting lines from hot path
> --------------------------------------------
>
> Key: CASSANDRA-14416
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14416
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Jeff Jirsa
> Assignee: Jeff Jirsa
> Priority: Minor
> Labels: performance
> Fix For: 3.11.x, 4.x
>
>
> In the BufferPool, we have a {{NoSpamLogger}} that gets called in some
> conditions (like when we're at or near the cap in a given pool), which has
> some string formatting on it. In situations where that log line is invoked,
> that string formatting gets called before the rate limiting, which becomes
> expensive.
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