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Posted to dev@phoenix.apache.org by "Ankit Singhal (Jira)" <ji...@apache.org> on 2021/06/07 14:55:04 UTC
[jira] [Updated] (PHOENIX-4266) Avoid scanner caching in Phoenix
[ https://issues.apache.org/jira/browse/PHOENIX-4266?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ankit Singhal updated PHOENIX-4266:
-----------------------------------
Fix Version/s: (was: 5.1.2)
> 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, 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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