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https://issues.apache.org/jira/browse/IMPALA-13154?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17889635#comment-17889635
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Zoltán Borók-Nagy commented on IMPALA-13154:
--------------------------------------------
Thanks Quanlong for filing this. The same applies to Top-N Tables with Most
Number of Files.
> Some tables are missing in Top-N Tables with Highest Memory Requirements
> ------------------------------------------------------------------------
>
> Key: IMPALA-13154
> URL: https://issues.apache.org/jira/browse/IMPALA-13154
> Project: IMPALA
> Issue Type: Bug
> Components: Catalog
> Reporter: Quanlong Huang
> Priority: Major
> Labels: catalog-2024
>
> In the /catalog page of catalogd WebUI, there is a table for "Top-N Tables
> with Highest Memory Requirements". However, not all tables are counted there.
> E.g. after starting catalogd, run a DESCRIBE on a table to trigger metadata
> loading on it. When it's done, the table is not shown in the WebUI.
> The cause is that the list is only updated in HdfsTable.getTHdfsTable() when
> 'type' is
> ThriftObjectType.FULL:
> [https://github.com/apache/impala/blob/ee21427d26620b40d38c706b4944d2831f84f6f5/fe/src/main/java/org/apache/impala/catalog/HdfsTable.java#L2457-L2459]
> This used to be the place that all code paths using the table will go to.
> However, we've done bunch of optimizations to not getting the FULL thrift
> object of the table. We should move the code of updating the list of largest
> tables somewhere that all table usages can reach, e.g. after loading the
> metadata of the table, we can update its estimatedMetadataSize.
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