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Posted to issues@hive.apache.org by "Slim Bouguerra (Jira)" <ji...@apache.org> on 2020/01/22 17:56:00 UTC

[jira] [Assigned] (HIVE-22760) Add Clock caching eviction based strategy

     [ https://issues.apache.org/jira/browse/HIVE-22760?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Slim Bouguerra reassigned HIVE-22760:
-------------------------------------


> Add Clock caching eviction based strategy
> -----------------------------------------
>
>                 Key: HIVE-22760
>                 URL: https://issues.apache.org/jira/browse/HIVE-22760
>             Project: Hive
>          Issue Type: New Feature
>          Components: llap
>            Reporter: Slim Bouguerra
>            Assignee: Slim Bouguerra
>            Priority: Major
>
> LRFU is the current default right now.
> The main issue with such Strategy is that it has a very high memory overhead, in addition to that, most of the accounting has to happen under locks thus can be source of contentions.
> Add Simpler policy like clock, can help with both issues.



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