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https://issues.apache.org/jira/browse/HBASE-9754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13974740#comment-13974740
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stack commented on HBASE-9754:
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[~jeffreyz] Rereading this patch, there is risk adding this to 0.96 but no
numbers proving improvement so I am reluctant backporting it. What you need in
particular to make phoenix work?
> Eliminate threadlocal from MVCC code
> ------------------------------------
>
> Key: HBASE-9754
> URL: https://issues.apache.org/jira/browse/HBASE-9754
> Project: HBase
> Issue Type: Bug
> Reporter: Lars Hofhansl
> Assignee: Ted Yu
> Fix For: 0.98.0, 0.99.0
>
> Attachments: 9754-0.94-v2.txt, 9754-0.94.txt, 9754-addendum.txt,
> 9754-rp-0.txt, 9754-rp-1.txt, 9754-rp-hregion-v2.txt, 9754-rp-hregion-v3.txt,
> 9754-rp-hregion.txt
>
>
> Brought up by [~vrodionov] and [[email protected]].
> Currently we use ThreadLocals to communicate the current readpoint between a
> RegionScanner and the Store\{File}Scanner's down the stack.
> Since ThreadLocals are not cheap we should consider whether it is possible to
> pass the readpoint through the call stack instead.
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