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Posted to dev@phoenix.apache.org by "Sergey Soldatov (JIRA)" <ji...@apache.org> on 2017/10/03 03:23:00 UTC

[jira] [Assigned] (PHOENIX-4266) Avoid scanner caching in Phoenix

     [ https://issues.apache.org/jira/browse/PHOENIX-4266?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sergey Soldatov reassigned PHOENIX-4266:
----------------------------------------

    Assignee: Sergey Soldatov

> Avoid scanner caching in Phoenix
> --------------------------------
>
>                 Key: PHOENIX-4266
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-4266
>             Project: Phoenix
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>            Assignee: Sergey Soldatov
>
> Phoenix tries to set caching on all scans. On HBase versions before 0.98 that made sense, now it is the wrong thing to do.
> HBase will by default do size based chunking. Setting scanner caching prevents HBase doing this work.
> We should avoid scanner everywhere, and only use in cases where we know the number of rows to be returned (and that number is small).
> [~sergey.soldatov], [~jamestaylor]



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