[ https://issues.apache.org/jira/browse/HBASE-15205?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ramkrishna.s.vasudevan updated HBASE-15205: ------------------------------------------- Attachment: ScopeWALEdits.jpg This pic shows how the scopeOfWalEdits creates lot of objects in a 1 min profile run. > 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: ScopeWALEdits.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)