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Posted to issues@hbase.apache.org by "Viraj Jasani (Jira)" <ji...@apache.org> on 2023/06/03 20:32:00 UTC

[jira] [Commented] (HBASE-27892) Report memstore on-heap and off-heap size as jmx metrics

    [ https://issues.apache.org/jira/browse/HBASE-27892?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17729018#comment-17729018 ] 

Viraj Jasani commented on HBASE-27892:
--------------------------------------

FYI [~jingyu] 

> Report memstore on-heap and off-heap size as jmx metrics
> --------------------------------------------------------
>
>                 Key: HBASE-27892
>                 URL: https://issues.apache.org/jira/browse/HBASE-27892
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Bryan Beaudreault
>            Priority: Major
>
> Currently we only report "memStoreSize" metric in sub=RegionServer bean. I've noticed a big discrepancy between this metric and the RS UI's "Memstore On-Heap Size". It seems like "memStoreSize" is the overall data size, while the on-heap size is coming from our heap estimation which includes POJO heap overhead, etc.
> I have a regionserver with only 750mb of "memStoreSize", but the on-heap size is over 1gb.  This is non-trivial for estimating overall heap size necessary for a regionserver. Since we have the data, let's report it.



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