cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-950) Cache BufferedRandomAccessFile.length
Date Wed, 07 Apr 2010 12:43:33 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-950?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12854465#action_12854465
] 

Hudson commented on CASSANDRA-950:
----------------------------------

Integrated in Cassandra #400 (See [http://hudson.zones.apache.org/hudson/job/Cassandra/400/])
    Cache BufferedRandomAccessFile.length result to avoid native call. Patch by johan, review
by jbellis. 


> Cache BufferedRandomAccessFile.length
> -------------------------------------
>
>                 Key: CASSANDRA-950
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-950
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Johan Oskarsson
>            Assignee: Johan Oskarsson
>             Fix For: 0.7
>
>         Attachments: CASSANDRA-950.patch, CASSANDRA-950.patch
>
>
> Profiling shows that BufferedRandomAccessFile.length is eating up an unexpected amount
of cpu. It believe it is the call through the "native barrier" that is causing it. We often
call the length method via is end of file when reading data. We can add caching of the file
length to avoid this call most times.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message