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From "Yuki Morishita (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-12739) Cassandra Tools use MAX_HEAP_SIZE if set
Date Fri, 30 Sep 2016 21:37:20 GMT


Yuki Morishita commented on CASSANDRA-12739:

As far as I know, only nodetool and debug-cql source
Other tools do not yet (CASSANDRA-8167).

> Cassandra Tools use MAX_HEAP_SIZE if set
> ---------------------------------------------------------
>                 Key: CASSANDRA-12739
>                 URL:
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Tools
>            Reporter: Brad Vernon
>         Attachments: cass-21_tools_xmx.patch, cass-22_tools_xmx.patch, cass-3x_tools_xmx.patch
> Nodetool and other bash startup scripts load variables including MAX_HEAP_SIZE
as part of CASSANDRA-10679.  If has MAX_HEAP_SIZE set to any value the default
heap size needed for the cassandra tool to run is overridden.  
> This is a problem if the using a large heap in C* i.e. 16-32G due to each instance of
nodetool or other tool will allocate large heap regardless of need and could exceed the total
RAM available on the system.
> Patch removes the check for MAX_HEAP_SIZE being set and uses the default heap size needed
for each tool.

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