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https://issues.apache.org/jira/browse/CASSANDRA-21175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18109618#comment-18109618
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Dmitry Konstantinov commented on CASSANDRA-21175:
-------------------------------------------------
Initial perf tests of 4.2: read worload (~200k requests/sec) - the difference
is on noise level
|| ||Netty 4.1||Netty 4.2||
| |{code:java}
Op rate : 234,175 op/s
Partition rate : 196,428 pk/s
Row rate : 1,964,277 row/s
Latency mean : 1.3 ms
Latency median : 0.7 ms
Latency 95th percentile : 2.3 ms
Latency 99th percentile : 14.0 ms
Latency 99.9th percentile : 29.0 ms
Latency max : 204.6 ms
Total partitions : 12,582,094
Total errors : 0
Total GC count : 19
Total GC memory : 350.540 GiB
Total GC time : 0.4 seconds
Avg GC time : 22.3 ms
StdDev GC time : 1.2 ms{code}|{code:java}
Op rate : 233,802 op/s
Partition rate : 196,067 pk/s
Row rate : 1,960,673 row/s
Latency mean : 1.3 ms
Latency median : 0.7 ms
Latency 95th percentile : 2.3 ms
Latency 99th percentile : 14.7 ms
Latency 99.9th percentile : 29.9 ms
Latency max : 152.0 ms
Total partitions : 12,579,037
Total errors : 0
Total GC count : 19
Total GC memory : 350.287 GiB
Total GC time : 0.5 seconds
Avg GC time : 24.4 ms
StdDev GC time : 2.4 ms
Total operation time : 00:01:04 {code}|
|% in CPU flamegraphs|8.4%|8.49%|
> Upgrade to Netty 4.2
> --------------------
>
> Key: CASSANDRA-21175
> URL: https://issues.apache.org/jira/browse/CASSANDRA-21175
> Project: Apache Cassandra
> Issue Type: Task
> Components: Messaging/Internode
> Reporter: Dmitry Konstantinov
> Assignee: Dmitry Konstantinov
> Priority: Normal
> Fix For: 7.x
>
> Attachments: netty_4.1_cpu.html, netty_4.2_cpu.html
>
>
> It is almost a year since Netty 4.2.0 initial release, so, it is probably a
> time to adopt it: https://netty.io/news/2025/04/03/4-2-0.html and get the
> latest perf improvements as well as an access to io_uring feature.
> https://netty.io/wiki/netty-4.2-migration-guide.html
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