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From "Mac Yang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-1910) Provide config parameters to control cache object pining
Date Fri, 21 Jan 2011 00:56:45 GMT

     [ https://issues.apache.org/jira/browse/HIVE-1910?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mac Yang updated HIVE-1910:
---------------------------

    Attachment: HIVE-1910.1.patch.txt

This enhancement is more relevant to metastore running in thrift server mode. With the current
code, a long running metastore server could potentially end up with a large number of objects
in memory (most notabl with Partition, SerDeInfo and StorageDescriptor object).

This patch adds a new config parameter, "hive.metastore.cache.pinobjtypes", to make object
pinning configurable. It also provides default value in hive-default.xml which will keep the
current behavior.

> Provide config parameters to control cache object pining
> --------------------------------------------------------
>
>                 Key: HIVE-1910
>                 URL: https://issues.apache.org/jira/browse/HIVE-1910
>             Project: Hive
>          Issue Type: Improvement
>          Components: Configuration
>    Affects Versions: 0.6.0
>            Reporter: Mac Yang
>            Priority: Minor
>         Attachments: HIVE-1910.1.patch.txt
>
>
> The metastore currently pin instances of the following classes in the secondary cache,
> MTable, MStorageDescriptor, MSerDeInfo, MPartition, MDatabase, MType, MFieldSchema, MOrder.class
> It would be better if this behavior is configurable instead of hard coded.

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