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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9956) Remove keyLength cache from KeyValue
Date Wed, 13 Nov 2013 19:43:21 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13821741#comment-13821741
] 

Hudson commented on HBASE-9956:
-------------------------------

SUCCESS: Integrated in hbase-0.96 #188 (See [https://builds.apache.org/job/hbase-0.96/188/])
HBASE-9956 Remove keyLength cache from KeyValue (larsh: rev 1541313)
* /hbase/branches/0.96/hbase-common/src/main/java/org/apache/hadoop/hbase/KeyValue.java
* /hbase/branches/0.96/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderV2.java
* /hbase/branches/0.96/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ScanQueryMatcher.java


> Remove keyLength cache from KeyValue
> ------------------------------------
>
>                 Key: HBASE-9956
>                 URL: https://issues.apache.org/jira/browse/HBASE-9956
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>            Priority: Minor
>             Fix For: 0.98.0, 0.96.1, 0.94.14
>
>         Attachments: 9935-0.94.txt, 9956-0.94.txt, 9956-trunk.txt
>
>
> See discussion in HBASE-9935. Currently KeyValue caches the keyLength in order to avoid
decoding the key length in getKeyLength() repeatedly.
> Benchmarking outside of a profiler revealed no improvement from that cache (and a sampling
profiler also does not indicate getKeyLength() as a performance issue).
> Along with this there's also a slight fix in ScanQueryMatcher.



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