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Posted to dev@hive.apache.org by "Vaibhav Gumashta (JIRA)" <ji...@apache.org> on 2018/04/06 10:32:00 UTC

[jira] [Created] (HIVE-19126) CachedStore: Use memory estimation to limit cache size during prewarm

Vaibhav Gumashta created HIVE-19126:
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             Summary: 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


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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