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Posted to commits@cassandra.apache.org by "Vijay (JIRA)" <ji...@apache.org> on 2014/11/21 19:27:37 UTC

[jira] [Created] (CASSANDRA-8362) Reduce memory usage of RefCountedMemory

Vijay created CASSANDRA-8362:
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             Summary: Reduce memory usage of RefCountedMemory
                 Key: CASSANDRA-8362
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8362
             Project: Cassandra
          Issue Type: Bug
            Reporter: Vijay
            Assignee: Vijay
            Priority: Minor


We can store the references as the first 4 bytes of the Unsafe memory and use case CAS[1] for reference counting of the memory.

This change will reduce the object over head + additional 4 bytes from java heap. Calling methods can reference as long's.

[1] http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/6-b14/java/util/concurrent/atomic/AtomicInteger.java#AtomicInteger.incrementAndGet%28%29



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