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https://issues.apache.org/jira/browse/KUDU-2890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16882119#comment-16882119
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Adar Dembo commented on KUDU-2890:
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There are several pieces of tracked memory that are included directly in a
tablet's memory tracker (i.e. without a sub-tracker). For example, the memory
footprint of all of a tablet's CFileReaders (one per data block) is tracked
this way, so if the tablet has a large number of data blocks, it'd show up in
this way. The same goes for BloomFileReaders (one per rowset) and
DeltaFileReaders (one per delta file).
If you want us to debug further, please upload a heap sample from your tserver.
Follow the instructions
[https://kudu.apache.org/docs/troubleshooting.html#heap_sampling|here].
> Tablet memory Unreleased
> ------------------------
>
> Key: KUDU-2890
> URL: https://issues.apache.org/jira/browse/KUDU-2890
> Project: Kudu
> Issue Type: Bug
> Components: tablet
> Affects Versions: 1.6.0
> Reporter: zhiyezou
> Priority: Major
> Attachments: image-2019-07-10-15-20-32-990.png
>
>
> This is the problem I encountered.
> !image-2019-07-10-15-20-32-990.png!
> I can not understand the memory usage by this tablet：total usage is larger
> than the MemRowSet + DeltaMemRowSet.
> Is there any memory used by tablet,and how can i find them.
> The total memory usage will grow up to the hard memory limit.
> Falling into periodic repetition.
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