[
https://issues.apache.org/jira/browse/HBASE-9751?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13793519#comment-13793519
]
Lars Hofhansl commented on HBASE-9751:
--------------------------------------
bq. stopRow is the REAL stopRow which exists. It must be the closest to the
Scan's stopRow, which is less or equal.
Which stopRow in which class are talking about? In
RegionScannerImple.isStopRow() it is not.
> 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-trunk.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.
--
This message was sent by Atlassian JIRA
(v6.1#6144)
