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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-15205) Do not find the replication scope for every WAL#append()
Date Tue, 02 Feb 2016 10:04:40 GMT
ramkrishna.s.vasudevan created HBASE-15205:
----------------------------------------------

             Summary: Do not find the replication scope for every WAL#append()
                 Key: HBASE-15205
                 URL: https://issues.apache.org/jira/browse/HBASE-15205
             Project: HBase
          Issue Type: Sub-task
            Reporter: ramkrishna.s.vasudevan
            Assignee: ramkrishna.s.vasudevan
            Priority: Minor
             Fix For: 2.0.0


After the byte[] and char[] the other top contributor for lot of GC (though it is only 2.86%)
is the UTF_8.newDecoder.
This happens because for every WAL append we try to calculate the replication scope associate
with the families associated with the TableDescriptor. I think per WAL append doing this is
very costly and creates lot of garbage. 



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