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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-5966) Average name query performance much worse for wide rows
Date Wed, 18 Sep 2013 15:15:55 GMT

     [ 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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