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From "Lars Hofhansl (Jira)" <j...@apache.org>
Subject [jira] [Assigned] (PHOENIX-4266) Avoid scanner caching in Phoenix
Date Thu, 09 Jan 2020 06:13:00 GMT

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

Lars Hofhansl reassigned PHOENIX-4266:
--------------------------------------

    Assignee:     (was: 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
>            Priority: Major
>
> 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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