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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-12463) MemstoreLAB reduce #objects created
Date Wed, 12 Nov 2014 09:01:34 GMT
Anoop Sam John created HBASE-12463:
--------------------------------------

             Summary: MemstoreLAB reduce #objects created
                 Key: HBASE-12463
                 URL: https://issues.apache.org/jira/browse/HBASE-12463
             Project: HBase
          Issue Type: Improvement
          Components: Performance
    Affects Versions: 0.99.0
            Reporter: Anoop Sam John
            Assignee: Anoop Sam John
             Fix For: 2.0.0, 0.99.2


By default Memstore uses MSLAB. For each of the Cell added to memstore, we will allocate area
in MSLAB and return the area in BR wrapper. So each time a new BR object is created. Instead
of this we can have ThreadLocal level BR instance and each time when allocate() API return
the BR, we can set the byte[], offset, length on this ThreadLocal level BR instance. So totally
only those many objects as the threads count (max handler count)



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