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From "Alexander Denissov (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AMBARI-15566) Update HAWQ default_hash_table_bucket_number property logic
Date Thu, 24 Mar 2016 18:30:25 GMT

     [ https://issues.apache.org/jira/browse/AMBARI-15566?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alexander Denissov updated AMBARI-15566:
----------------------------------------
    Description: 
Update the recommendation logic:
Given that the hawq_rm_nvseg_perquery_limit = 512,
1) default_hash_table_bucket_number = #nodes * x where x is the maximal value that satisfy
two conditions: x <= 6 and #nodes * x < 512
2) if #nodes > 512, default_hash_table_bucket_number = 512.


> Update HAWQ default_hash_table_bucket_number property logic
> -----------------------------------------------------------
>
>                 Key: AMBARI-15566
>                 URL: https://issues.apache.org/jira/browse/AMBARI-15566
>             Project: Ambari
>          Issue Type: Bug
>            Reporter: Alexander Denissov
>            Assignee: Alexander Denissov
>            Priority: Minor
>             Fix For: 2.2.2
>
>         Attachments: AMBARI-15566.branch22.patch
>
>
> Update the recommendation logic:
> Given that the hawq_rm_nvseg_perquery_limit = 512,
> 1) default_hash_table_bucket_number = #nodes * x where x is the maximal value that satisfy
two conditions: x <= 6 and #nodes * x < 512
> 2) if #nodes > 512, default_hash_table_bucket_number = 512.



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