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Posted to dev@hive.apache.org by "Ádám Szita (Jira)" <ji...@apache.org> on 2020/02/03 15:26:00 UTC

[jira] [Created] (HIVE-22820) Proactive LLAP cache eviction

Ádám Szita created HIVE-22820:
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             Summary: Proactive LLAP cache eviction
                 Key: HIVE-22820
                 URL: https://issues.apache.org/jira/browse/HIVE-22820
             Project: Hive
          Issue Type: Improvement
          Components: llap
            Reporter: Ádám Szita
            Assignee: Ádám Szita


Currently LLAP cache eviction is only based on an eviction policy, that is reactive in a way that it only evicts buffers whenever there's space required for new ones.

It does not take for example dropped entities (partitions, tables or even dbs) into consideration. We should also implement a proactive side of the eviction that does this for us, and in turn could increase overall cache hit ratios.



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