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From "Daniel Dai (JIRA)" <>
Subject [jira] [Updated] (HIVE-21787) Metastore table cache LRU eviction
Date Tue, 25 Jun 2019 20:59:00 GMT


Daniel Dai updated HIVE-21787:
       Resolution: Fixed
     Hadoop Flags: Reviewed
    Fix Version/s: 4.0.0
           Status: Resolved  (was: Patch Available)

Close this one. Will tract unit tests on another ticket.

> Metastore table cache LRU eviction
> ----------------------------------
>                 Key: HIVE-21787
>                 URL:
>             Project: Hive
>          Issue Type: New Feature
>          Components: Standalone Metastore
>            Reporter: Sam An
>            Assignee: Sam An
>            Priority: Major
>             Fix For: 4.0.0
>         Attachments: HIVE-21787.1.patch, HIVE-21787.10.patch, HIVE-21787.11.patch, HIVE-21787.13.patch,
HIVE-21787.14.patch, HIVE-21787.15.patch, HIVE-21787.2.patch, HIVE-21787.3.patch, HIVE-21787.4.patch,
HIVE-21787.5.patch, HIVE-21787.6.patch, HIVE-21787.7.patch, HIVE-21787.8.patch, HIVE-21787.9.patch
> Metastore currently uses black/white list to specify patterns of tables to load into
the cache. Cache is loaded in one shot "prewarm", and updated by a background thread. This
is not a very efficient design. 
> In this feature, we try to enhance the cache for Tables with LRU to improve cache utilization.

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