[
https://issues.apache.org/jira/browse/HBASE-5056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13445485#comment-13445485
]
Chris Trezzo commented on HBASE-5056:
-------------------------------------
[~stack] Since HFilev2 is the default now, can we consider this issue resolved?
> [performance] On upload, 4% of memory allocations are NullInstance
> ------------------------------------------------------------------
>
> Key: HBASE-5056
> URL: https://issues.apache.org/jira/browse/HBASE-5056
> Project: HBase
> Issue Type: Improvement
> Components: performance
> Reporter: stack
> Labels: noob
> Attachments: NullInstanceHotSpotMemAllocation.html
>
>
> Profiling a PE upload, I see that 4% of memory allocations are instances of
> NullInstance (caveat profiler's give distorted view of running app as does PE
> when it comes to real-world workloads). See attached profiler output. Looks
> like we could save a bunch on object creation if we had our own
> WritableFactories instance that treated stuff like NullInstance special
> creating a Singleton NullInstance per declared class type returning these
> instead of creating new ones.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
