Márk Dezsőfi created CASSANDRA-19013:
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Summary: Performance issues after Cassandra upgrade
Key: CASSANDRA-19013
URL: https://issues.apache.org/jira/browse/CASSANDRA-19013
Project: Cassandra
Issue Type: Bug
Components: Local/Config
Reporter: Márk Dezsőfi
I would like to ask for your help in the following issue.
We have upgraded our Cassandra 3.11.4 to 4.1.2 in production environment and
since that we're facing with many performance issues:
* The cluster operations lowered to 17-20k/s which was between 21-25k/s with
3.11.4
* CPU usage significantly increased -> previously it was nearly 50% at peak
times, after the update it's between 65-70%
* Pending tasks increased -> from nearly 0 to 30 at peak times
* Native Transport Requests significantly increased -> from 100-200 to 2K-3K
at peak times
* Chunck cache hit rate metric stopped working
* Read latency increased from microsecs to milisecs
* sstables per read histogram also shows increased values
We have already done with:
* file_cache_enabled has been enabled
* sstableupgrade
* Java has been updated from 8 to 11
* Made a truncate of affected keyspace
* Affected keyspace's indexes has been rebuilt
Our infrastructure contains 2 DCs with 24 nodes/dc. Every node has 8 CPUs and
64GBs of RAM and running on RHEL 8.6.
We have already compared the two versions but didn't notice any new feature or
option which could cause this performance degradation. If do you have any idea
or do you need any kind of logs don't hesitate to contact me.
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