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Posted to issues@impala.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2019/04/10 15:44:00 UTC

[jira] [Resolved] (IMPALA-7540) Intern common strings in catalog

     [ https://issues.apache.org/jira/browse/IMPALA-7540?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Todd Lipcon resolved IMPALA-7540.
---------------------------------
       Resolution: Fixed
    Fix Version/s: Impala 3.2.0

> Intern common strings in catalog
> --------------------------------
>
>                 Key: IMPALA-7540
>                 URL: https://issues.apache.org/jira/browse/IMPALA-7540
>             Project: IMPALA
>          Issue Type: Improvement
>    Affects Versions: Impala 3.1.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Major
>             Fix For: Impala 3.2.0
>
>
> Using jxray shows that there are many common duplicate strings in the catalog. For example, each table repeats the database name, and metadata like the HMS parameter maps reuse a lot of common strings like "EXTERNAL" or "transient_lastDdlTime". We should intern these to save memory.



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