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Posted to issues@phoenix.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2023/05/31 10:21:00 UTC

[jira] [Commented] (PHOENIX-6965) UngroupedAggregateRegionScanner.insertEmptyKeyValue() generates too many cells

    [ https://issues.apache.org/jira/browse/PHOENIX-6965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17727882#comment-17727882 ] 

ASF GitHub Bot commented on PHOENIX-6965:
-----------------------------------------

stoty opened a new pull request, #1615:
URL: https://github.com/apache/phoenix/pull/1615

   …nerates too many cells




> UngroupedAggregateRegionScanner.insertEmptyKeyValue() generates too many cells
> ------------------------------------------------------------------------------
>
>                 Key: PHOENIX-6965
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-6965
>             Project: Phoenix
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 5.2.0, 5.1.3
>            Reporter: Istvan Toth
>            Assignee: Istvan Toth
>            Priority: Critical
>
> UngroupedAggregateRegionScanner.insertEmptyKeyValue() is supposed to generate one empty cell for each timestmap.
> However, it never adds the generated timestamp to the controll map, and generated an empty cell for each existing cell.
> IIRC, these are all set to the the RS an d to WAL, and are only consolidated in the memstore, leading to a lot of wasted cpu, memory, io, and network resources.



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