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Posted to notifications@asterixdb.apache.org by "Till (JIRA)" <ji...@apache.org> on 2019/05/24 17:25:01 UTC

[jira] [Assigned] (ASTERIXDB-2571) Memory assigned out of the budget in hash join for large objects

     [ https://issues.apache.org/jira/browse/ASTERIXDB-2571?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Till reassigned ASTERIXDB-2571:
-------------------------------

    Assignee: Till

> Memory assigned out of the budget in hash join for large objects
> ----------------------------------------------------------------
>
>                 Key: ASTERIXDB-2571
>                 URL: https://issues.apache.org/jira/browse/ASTERIXDB-2571
>             Project: Apache AsterixDB
>          Issue Type: Bug
>          Components: *DB - AsterixDB
>    Affects Versions: 0.9.4.1
>            Reporter: Shiva Jahangiri
>            Assignee: Till
>            Priority: Major
>
> Currently in optimized hybrid hash join in case of lack of memory asterix flushes the big prob object to the disk. For flushing a big object, a variable sized frame will be created from hyracks context not join memory budget. This means we may use more than the given budget.
> Possible solutions:
> 1) Have a way to flush the incoming frame/buffer directly to the disk.
> 2) Spill enough data to be able to fit the large object(less preferred as it hurts the performance).



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