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Posted to dev@hive.apache.org by "Sergey Shelukhin (JIRA)" <ji...@apache.org> on 2013/08/30 22:24:52 UTC

[jira] [Updated] (HIVE-5189) make batching in partition retrieval in metastore applicable to more methods

     [ https://issues.apache.org/jira/browse/HIVE-5189?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sergey Shelukhin updated HIVE-5189:
-----------------------------------

    Component/s: Metastore
    
> make batching in partition retrieval in metastore applicable to more methods
> ----------------------------------------------------------------------------
>
>                 Key: HIVE-5189
>                 URL: https://issues.apache.org/jira/browse/HIVE-5189
>             Project: Hive
>          Issue Type: Improvement
>          Components: Metastore
>            Reporter: Sergey Shelukhin
>
> As indicated in HIVE-5158, Metastore can OOM if retrieving a large number of partitions. For client-side partition filtering, the client applies batching (that would avoid that) by sending parts of the filtered name list in separate request according to configuration.
> The batching is not used on filter pushdown path, and when retrieving all partitions (e.g. when the pruner expression is not useful in non-strict mode). HIVE-4914 and pushdown improvements will make this problem somewhat worse by allowing more requests to go to the server.
> There needs to be some batching scheme (ideally, a somewhat generic one) that would be applicable to all these paths.

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