[
https://issues.apache.org/jira/browse/HBASE-15205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15159242#comment-15159242
]
stack commented on HBASE-15205:
-------------------------------
What is 'bulk load replication'.... Can you say more on the scenario you
describe above on bulk loading and replication? Sorry for my being so think on
this [~ram_krish]
> 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
> Components: regionserver
> Reporter: ramkrishna.s.vasudevan
> Assignee: ramkrishna.s.vasudevan
> Priority: Minor
> Fix For: 2.0.0
>
> Attachments: HBASE-15204_6.patch, HBASE-15205.patch,
> HBASE-15205_1.patch, HBASE-15205_2.patch, HBASE-15205_3.patch,
> HBASE-15205_4.patch, HBASE-15205_6.patch, HBASE-15205_6.patch,
> HBASE-15205_7.patch, ScopeWALEdits.jpg, ScopeWALEdits_afterpatch.jpg
>
>
> 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.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
