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Posted to issues@hbase.apache.org by "Duo Zhang (Jira)" <ji...@apache.org> on 2020/07/05 04:06:00 UTC

[jira] [Updated] (HBASE-24659) Calculate FIXED_OVERHEAD automatically

     [ https://issues.apache.org/jira/browse/HBASE-24659?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Duo Zhang updated HBASE-24659:
------------------------------
    Summary: Calculate FIXED_OVERHEAD automatically  (was: Calcuate FIXED_OVERHEAD automatically)

> Calculate FIXED_OVERHEAD automatically
> --------------------------------------
>
>                 Key: HBASE-24659
>                 URL: https://issues.apache.org/jira/browse/HBASE-24659
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Duo Zhang
>            Assignee: niuyulin
>            Priority: Major
>
> Now the FIXED_OVERHEAD in some classes are maintained manually, an we have a method to TestHeapSizes to confirm that the value is correct.
> But it is really hard for developers to count the fields in a complicated class like HRegion. Since we have the ability to calcuate the accurate size in UT, I think we it is also possible to calcuate it when loading the class, which is a one time operation so should not effect the performance too much.



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