hive-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Prasanth Jayachandran (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HIVE-17304) ThreadMXBean based memory allocation monitory for hash table loader
Date Fri, 11 Aug 2017 23:31:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-17304?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Prasanth Jayachandran reassigned HIVE-17304:
--------------------------------------------


> 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
>
> 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. 



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

Mime
View raw message