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Hudson commented on HBASE-15204: -------------------------------- SUCCESS: Integrated in HBase-1.3 #542 (See [https://builds.apache.org/job/HBase-1.3/542/]) HBASE-15204 Try to estimate the cell count for adding into WALEdit (ramkrishna: rev bd4a4ecf5e1e23321801d5f18dab1dc068ba43da) * hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java * hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/WALEdit.java > 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 > Components: regionserver > Reporter: ramkrishna.s.vasudevan > Assignee: ramkrishna.s.vasudevan > Fix For: 2.0.0, 1.3.0 > > Attachments: HBASE-15204.patch, HBASE-15204_1.patch, > HBASE-15204_1.patch, WAlEdit_add_allocation.jpg, > WAlEdit_add_allocation_after_patch.jpg > > > 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)