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Posted to issues@hbase.apache.org by "Jonathan Gray (JIRA)" <ji...@apache.org> on 2010/05/13 07:40:43 UTC

[jira] Commented: (HBASE-2179) get performance problem with concurrent reads

    [ https://issues.apache.org/jira/browse/HBASE-2179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12867061#action_12867061 ] 

Jonathan Gray commented on HBASE-2179:
--------------------------------------

is this fixed by HBASE-2248?

> get performance problem with concurrent reads
> ---------------------------------------------
>
>                 Key: HBASE-2179
>                 URL: https://issues.apache.org/jira/browse/HBASE-2179
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: ryan rawson
>            Assignee: ryan rawson
>             Fix For: 0.21.0
>
>
> a get obtains a row lock before reading, which then blocks all other gets and puts to that row. on highly concurrent rows this reduces our performance and needlessly serializes reads.

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