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From "Aman Sinha (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-1022) Provide option settings for controlling hash table size
Date Thu, 19 Jun 2014 04:54:24 GMT

    [ https://issues.apache.org/jira/browse/DRILL-1022?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14036959#comment-14036959
] 

Aman Sinha commented on DRILL-1022:
-----------------------------------

Uploaded patch with the following enhancements:  2 new option settings were added:  'exec.min_hash_table_size'
 and 'exec.max_hash_table_size'.   These control the minimum and maximum hash table size 
- Note that these values are in terms of number of hash buckets, not in terms of memory size.
 The default value of min_hash_table_size is 2^16 and max_hash_table_size is 2^30 which is
also the upper bound  for both settings.  For most practical purposes, only the minimum size
needs to be modified if needed.  

> Provide option settings for controlling hash table size
> -------------------------------------------------------
>
>                 Key: DRILL-1022
>                 URL: https://issues.apache.org/jira/browse/DRILL-1022
>             Project: Apache Drill
>          Issue Type: Improvement
>            Reporter: Aman Sinha
>            Assignee: Aman Sinha
>         Attachments: DRILL-1022.patch
>
>
> Provide session and system option settings to control the minimum and maximum hash table
size for operators such as HashJoin and HashAggregate.  



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