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Ted Yu commented on HBASE-15204: -------------------------------- {code} - WALEdit walEdit = new WALEdit(isInReplay); + WALEdit walEdit = new WALEdit(cellCount); {code} We don't need to distinguish replay mode any more ? > 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 > > Attachments: HBASE-15204.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)