[
https://issues.apache.org/jira/browse/HBASE-27710?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Bryan Beaudreault reassigned HBASE-27710:
-----------------------------------------
Assignee: Bryan Beaudreault
> ByteBuff ref counting is too expensive for on-heap buffers
> ----------------------------------------------------------
>
> Key: HBASE-27710
> URL: https://issues.apache.org/jira/browse/HBASE-27710
> Project: HBase
> Issue Type: Improvement
> Reporter: Bryan Beaudreault
> Assignee: Bryan Beaudreault
> Priority: Major
>
> We recently were upgrading an internal project's hbase client from 1.2 to
> 2.5. The project does raw HFile.Reader reading of some hfiles. We noticed an
> over 4x performance regression with the new client. Profiling showed that the
> majority of the time was spent in SingleByteBuff.checkRefCount. That ref
> counting is necessary for off-heap reads, but this case was using on-heap.
> Removing checkRefCount eliminated the regression.
> I asked on the dev list and we agreed to remove checkRefCount calls for
> on-heap buffers:
> https://lists.apache.org/thread/2qm0g8fbxb0no4ozfx7bw8xmkryt4zz0
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
