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https://issues.apache.org/jira/browse/CASSANDRA-19529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17834318#comment-17834318
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Nicolas Henneaux edited comment on CASSANDRA-19529 at 4/5/24 1:56 PM:
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I have found where it was introduced, commit introduced it
[https://github.com/apache/cassandra/commit/9f15ec6de11c57d5fff02fe08639b647fc0749e8.]
I have made quite a lot of tests which ends up to commit
9ed8810183abdf15cbb72c23ab078b61c14ee2cd behaving correctly and
9f15ec6de11c57d5fff02fe08639b647fc0749e8 incorrectly. Comparison
https://github.com/apache/cassandra/compare/9ed8810183abdf15cbb72c23ab078b61c14ee2cd...9f15ec6de11c57d5fff02fe08639b647fc0749e8
cc [~jasobrown] [~jmckenzie] [~smiklosovic]
was (Author: nicolas.henneaux):
I have found where it was introduced, commit introduced it
[https://github.com/apache/cassandra/commit/9f15ec6de11c57d5fff02fe08639b647fc0749e8.]
I have made quite a lot of tests which ends up to commit
9ed8810183abdf15cbb72c23ab078b61c14ee2cd behaving correctly and
9f15ec6de11c57d5fff02fe08639b647fc0749e8 incorrectly. Comparison
https://github.com/apache/cassandra/compare/9ed8810183abdf15cbb72c23ab078b61c14ee2cd...9f15ec6de11c57d5fff02fe08639b647fc0749e8
cc [~jasobrown] [~jmckenzie] [~stefan.miklosovic]
> Latency regression on 4.1 comparing to 4.0
> ------------------------------------------
>
> Key: CASSANDRA-19529
> URL: https://issues.apache.org/jira/browse/CASSANDRA-19529
> Project: Cassandra
> Issue Type: Bug
> Reporter: Nicolas Henneaux
> Priority: Normal
> Attachments: screenshot-1.png
>
>
> When upgrading from Cassandra 4.0.10 to 4.1.3, I noticed an increase from
> application point of view latency from ~8ms to ~15ms when upgrading to
> Cassandra. The latency includes 3 simple queries (INSERT + SELECT (PK+CK) +
> UPDATE) plus application overhead.
> It has been investigated in CASSANDRA-18766 to realize it is not related.
> I tested to downgrade to 4.1alpha1 and the latency regression is still there
> with same value.
> The version 4.1.4 has the same issue.
> In a graph how it looks like
> !screenshot-1.png!
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