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https://issues.apache.org/jira/browse/HBASE-9751?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13793913#comment-13793913
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Hudson commented on HBASE-9751:
-------------------------------
SUCCESS: Integrated in HBase-0.94 #1171 (See
[https://builds.apache.org/job/HBase-0.94/1171/])
HBASE-9751 Excessive readpoints checks in StoreFileScanner (larsh: rev 1531792)
*
/hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/io/hfile/AbstractHFileReader.java
* /hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/io/hfile/HFile.java
*
/hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderV2.java
*
/hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFile.java
*
/hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileScanner.java
> Excessive readpoints checks in StoreFileScanner
> ------------------------------------------------
>
> Key: HBASE-9751
> URL: https://issues.apache.org/jira/browse/HBASE-9751
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.98.0, 0.94.12, 0.96.0
> Reporter: Vladimir Rodionov
> Assignee: Lars Hofhansl
> Fix For: 0.98.0, 0.94.13, 0.96.1
>
> Attachments: 9751-0.94.txt, 9751-0.94-v2.txt, 9751-trunk.txt,
> 9751-trunk-v2.txt
>
>
> It seems that usage of skipKVsNewerThanReadpoint in StoreFileScanner can be
> greatly reduced or even eliminated all together (HFiles are immutable and no
> new KVs can be inserted after scanner instance is created). The same is true
> for MemStoreScanner which checks readpoint on every next() and seek(). Each
> readpoint check is ThreadLocal.get() and it is quite expensive.
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