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https://issues.apache.org/jira/browse/KUDU-3097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17459186#comment-17459186
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YifanZhang commented on KUDU-3097:
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The [master design
doc|https://github.com/apache/kudu/blob/master/docs/design-docs/master.md]
mentioned we could have a new backgroud task to cleanup 'deleted' state
table/tablets from in-momery map and SysCatalogTable. Is it safe to do that or,
why we need to keep these deleted table/tablets?
> whether master load deleted entries into memory could be configuable
> --------------------------------------------------------------------
>
> Key: KUDU-3097
> URL: https://issues.apache.org/jira/browse/KUDU-3097
> Project: Kudu
> Issue Type: New Feature
> Reporter: wangningito
> Assignee: wangningito
> Priority: Major
> Attachments: image-2020-05-28-19-41-05-485.png, screenshot-1.png,
> set-09.svg
>
>
> The tablet of master is not under control of MVCC.
> The deleted entries like table structure, deleted tablet ids would be load
> into memory.
> For those who use the massive columns or lots of tablets and frequently
> switch table, it may result in some unnecessary memory usage.
> By the way, the memory usage is different between leader and follower in
> master. It may result in imbalance among master cluster.
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