Prasanth Jayachandran updated HIVE-17304:
    Status: Patch Available  (was: Open)

> ThreadMXBean based memory allocation monitory for hash table loader
> -------------------------------------------------------------------
>                 Key: HIVE-17304
>                 URL: https://issues.apache.org/jira/browse/HIVE-17304
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 3.0.0
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>         Attachments: HIVE-17304.1.patch
> Hash table memory monitoring is based on java data model which can be 
> unreliable because of various reasons (wrong object size estimation, adding 
> new variables to any class without accounting its size for memory monitoring, 
> etc.). We can use allocation size per thread that is provided by ThreadMXBean 
> and fallback to DataModel in case if JDK doesn't support thread based 
> allocations. 

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