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Date: Wed, 18 Sep 2013 15:15:55 +0000 (UTC)
From: "Jonathan Ellis (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
Message-ID: <JIRA.12666476.1377994358306.155109.1379517355237@arcas>
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Subject: [jira] [Updated] (CASSANDRA-5966) Average name query performance
 much worse for wide rows
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     [ https://issues.apache.org/jira/browse/CASSANDRA-5966?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Ellis updated CASSANDRA-5966:
--------------------------------------

      Priority: Minor  (was: Major)
    Issue Type: Improvement  (was: Bug)
    
> Average name query performance much worse for wide rows
> -------------------------------------------------------
>
>                 Key: CASSANDRA-5966
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5966
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Rick Branson
>            Assignee: Rick Branson
>            Priority: Minor
>             Fix For: 1.2.10, 2.0.1
>
>         Attachments: 5966-trunk.txt, 5966.txt, 5966-v2.txt
>
>
> The average performance for by-name queries degrades heavily on wide rows. This is because in the wide row case SSTableNamesIterator deserializes every column in the entire row chunk (64KB by default), where-as in the narrow row case, it stops deserializing as soon as it's found the columns it's looking for.

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