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https://issues.apache.org/jira/browse/HBASE-15204?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ramkrishna.s.vasudevan updated HBASE-15204:
-------------------------------------------
Attachment: HBASE-15204_1.patch
Updated patch. Does not pass the cellcount from RsRpcServices. Instead tries to
find the cellCount from the familyMaps associated with each of the mutation and
then sets the WALEdit. So anyway we are now having a value > 1 for the
ArrayList backing the WALEdit.
> 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, 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.
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