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From "Jonathan Ellis (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-3295) reduce default heap size
Date Mon, 03 Oct 2011 05:13:34 GMT
reduce default heap size
------------------------

                 Key: CASSANDRA-3295
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3295
             Project: Cassandra
          Issue Type: Improvement
    Affects Versions: 1.0.0
            Reporter: Jonathan Ellis
            Assignee: Brandon Williams
            Priority: Minor
             Fix For: 1.0.0


With off-heap caching now the default and with auto-flushed memtables demonstrated to do a
good job with smaller heaps, I think it's time to reduce heap sizes to decrease GC pause times.

How does this sound?

- half the ram, up to 512MB, or
- 1/4 the ram, up to 4 GB

i.e.:

max(min(1/2 ram, 512MB), min(1/4 ram, 4GB))

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