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https://issues.apache.org/jira/browse/HBASE-12148?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15240239#comment-15240239
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stack commented on HBASE-12148:
-------------------------------
Thanks [~lhofhansl] for the reminder.
Yes, original report was write time.
We don't actually do what the original report was complaining of originally
where we are updating TR in MemStore but yeah, I see at flush time we could be
doing lots of new instance creations... almost one per Cell as we write them
out. Probably fine given they are short-lived objects. We could do your
suggestion of two implementations.... The attached one for read time where many
threads contending and then another for the case where one thread only writing.
Let me look.
> Remove TimeRangeTracker as point of contention when many threads writing a
> Store
> --------------------------------------------------------------------------------
>
> Key: HBASE-12148
> URL: https://issues.apache.org/jira/browse/HBASE-12148
> Project: HBase
> Issue Type: Sub-task
> Components: Performance
> Affects Versions: 2.0.0, 0.99.1
> Reporter: stack
> Assignee: Walter Koetke
> Fix For: 2.0.0, 1.3.0, 0.98.19
>
> Attachments:
> 0001-In-AtomicUtils-change-updateMin-and-updateMax-to-ret.patch,
> 12148.addendum.txt, 12148.txt, 12148.txt, 12148v2.txt, 12148v2.txt,
> HBASE-12148-V3.patch, HBASE-12148-V3.patch, HBASE-12148.txt,
> HBASE-12148V2.txt, Screen Shot 2014-10-01 at 3.39.46 PM.png, Screen Shot
> 2014-10-01 at 3.41.07 PM.png, Screen Shot 2016-04-13 at 1.49.30 PM.png,
> Screen Shot 2016-04-13 at 2.02.22 PM.png, TimeRangeTracker.tiff
>
>
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