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

["Viraj Jasani (Jira)" <ji...@apache.org>]

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

Viraj Jasani updated PHOENIX-4266:
----------------------------------
    Fix Version/s:     (was: 4.16.1)
                   4.16.2
                   5.1.2
                   5.2.0

> 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
>             Fix For: 4.17.0, 5.2.0, 5.1.2, 4.16.2
>
>
> 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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