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https://issues.apache.org/jira/browse/CASSANDRA-18329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17715639#comment-17715639
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Benjamin Lerer commented on CASSANDRA-18329:
--------------------------------------------
We have heavily worked on Jamm and at this point its outcome will be more
correct than the results provided by {{RamUsageEstimator}} for the different
JVM versions. Jamm is also able to measure things that {{RamUsageEstimator}}
will fail to measure like (module protected fields, hidden classes or records).
Jamm provides also some features used by C* that {{RamUsageEstimator}} does
not provide (the ability to ignore some classes, advanced filtering to avoid
scanning large portion of the JVM internals ...).
One thing that {{RamUsageEstimator}} has and that we did not provide is caching
when crawling a graph of object but we can add that feature.
> Upgrade jamm
> ------------
>
> Key: CASSANDRA-18329
> URL: https://issues.apache.org/jira/browse/CASSANDRA-18329
> Project: Cassandra
> Issue Type: Task
> Components: Jamm
> Reporter: Ekaterina Dimitrova
> Priority: Normal
> Fix For: 4.0.x, 4.1.x, 5.x
>
>
> Jamm is currently under maintenance that will solve JDK11 issues and enable
> it to work with post JDK11+ versions up to JDK17.
> This ticket will serve as a placeholder for upgrading Jamm in Cassandra when
> the new Jamm release is out.
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