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Posted to issues@hawq.apache.org by "Lei Chang (JIRA)" <ji...@apache.org> on 2015/11/21 04:16:11 UTC

[jira] [Reopened] (HAWQ-88) set default value of guc hash_to_random_flag to be ENFORCE_KEEP_HASH

     [ https://issues.apache.org/jira/browse/HAWQ-88?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Lei Chang reopened HAWQ-88:
---------------------------

> set default value of guc hash_to_random_flag to  be ENFORCE_KEEP_HASH
> ---------------------------------------------------------------------
>
>                 Key: HAWQ-88
>                 URL: https://issues.apache.org/jira/browse/HAWQ-88
>             Project: Apache HAWQ
>          Issue Type: New Feature
>          Components: Core
>            Reporter: Hubert Zhang
>            Assignee: Hubert Zhang
>             Fix For: 2.0.0-beta-incubating
>
>
> guc hash_to_random_flag has three values: HASH_TO_RANDOM_BASEDON_DATALOCALITY, ENFORCE_HASH_TO_RANDOM  and ENFORCE_KEEP_HASH.
> It determines the different behaviour of whether to convert a hash table to random when vseg number equals to table bucket number(since when vseg num doesn't equal to bucket number, it must be converted to random)
> We now set this guc to ENFORCE_KEEP_HASH by default.



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