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Posted to commits@cassandra.apache.org by "Jonathan Ellis (JIRA)" <ji...@apache.org> on 2015/07/01 19:56:06 UTC

[jira] [Updated] (CASSANDRA-5966) Average name query performance much worse for wide rows

     [ https://issues.apache.org/jira/browse/CASSANDRA-5966?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Ellis updated CASSANDRA-5966:
--------------------------------------
         Assignee: T Jake Luciani  (was: Rick Branson)
    Fix Version/s:     (was: 2.0.x)

Jake, can you evaluate this post-8099?

> 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: T Jake Luciani
>            Priority: Minor
>         Attachments: 5966-trunk.txt, 5966-v2.txt, 5966.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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