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From "Jim Witschey (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-10581) Update cassandra.yaml comments to reflect memory_allocator deprecation, remove in 3.0
Date Wed, 28 Oct 2015 19:06:27 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-10581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14979047#comment-14979047
] 

Jim Witschey commented on CASSANDRA-10581:
------------------------------------------

Yep, that's about what I had in mind, if that's the best visibility we can get. I'm +1.

> 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.x, 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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