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Posted to issues@hbase.apache.org by "ramkrishna.s.vasudevan (JIRA)" <ji...@apache.org> on 2016/02/02 09:48:39 UTC

[jira] [Created] (HBASE-15204) Try to estimate the cell count for adding into WALEdit

ramkrishna.s.vasudevan created HBASE-15204:
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             Summary: Try to estimate the cell count for adding into WALEdit
                 Key: HBASE-15204
                 URL: https://issues.apache.org/jira/browse/HBASE-15204
             Project: HBase
          Issue Type: Sub-task
            Reporter: ramkrishna.s.vasudevan
            Assignee: ramkrishna.s.vasudevan
             Fix For: 2.0.0


The write path profiling shows that when we try to add Cells to WALEdits we try to do a lot of Array copy inorder to grow the Arraylist backing the WALEdits. In a simple one min profiling of the write path with 50 YCSB threads shows around 261MB of allocation done for the Array copy to happen. We can try to avoid that. 



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