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Posted to issues@hive.apache.org by "Vaibhav Gumashta (JIRA)" <ji...@apache.org> on 2018/04/06 10:32:00 UTC
[jira] [Assigned] (HIVE-19126) CachedStore: Use memory estimation
to limit cache size during prewarm
[ https://issues.apache.org/jira/browse/HIVE-19126?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Vaibhav Gumashta reassigned HIVE-19126:
---------------------------------------
Assignee: Vaibhav Gumashta
> CachedStore: Use memory estimation to limit cache size during prewarm
> ---------------------------------------------------------------------
>
> Key: HIVE-19126
> URL: https://issues.apache.org/jira/browse/HIVE-19126
> Project: Hive
> Issue Type: Sub-task
> Components: Metastore
> Affects Versions: 3.0.0
> Reporter: Vaibhav Gumashta
> Assignee: Vaibhav Gumashta
> Priority: Major
>
> We can rely on https://github.com/apache/hive/blob/master/llap-server/src/java/org/apache/hadoop/hive/llap/IncrementalObjectSizeEstimator.java to estimate memory of SharedCache. This jira addresses the size estimation during prewarm, so that we can stop when we hit the memory limit. In a follow-up jira, we will work on estimation/eviction after prewarm is complete, so that we can keep the frequently used tables and their partitions in cache.
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