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https://issues.apache.org/jira/browse/CASSANDRA-10581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14985422#comment-14985422
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Jim Witschey commented on CASSANDRA-10581:
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It's a visibility issue -- outside of some kind of logging at startup, there's
no real feedback that you're successfully using JEMAlloc, unless there's
something I've missed.
I hadn't though about the minor release part of it, though. Adding a warning is
probably too much, I agree.
> Update cassandra.yaml comments to reflect memory_allocator deprecation,
> remove in 3.0
> -------------------------------------------------------------------------------------
>
> Key: CASSANDRA-10581
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10581
> Project: Cassandra
> Issue Type: Bug
> Reporter: Jim Witschey
> Assignee: Robert Stupp
> Fix For: 2.2.4, 3.0.0
>
>
> Looks like in 2.2+ changing the {{memory_allocator}} field in cassandra.yaml
> has no effect:
> https://github.com/apache/cassandra/commit/0d2ec11c7e0abfb84d872289af6d3ac386cf381f#diff-b66584c9ce7b64019b5db5a531deeda1R207
> The instructions in comments on how to use jemalloc haven't been updated to
> reflect this change. [~snazy], is that an accurate assessment?
> [~iamaleksey] How do we want to handle the deprecation more generally? Warn
> on 2.2, remove in 3.0?
> EDIT: I described this in a way that isn't very clear to those unfamiliar
> with Robert's change. To be clear: You can still use JEMAlloc with Cassandra.
> The {{memory_allocator}} option was deprecated in favor of automatically
> detecting if JEMAlloc is installed, and, if so, using it.
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