Sergey Shelukhin updated HIVE-16992:
    Attachment: HIVE-16992.patch

> LLAP: monitoring and better default lambda for LRFU policy
> ----------------------------------------------------------
>                 Key: HIVE-16992
>                 URL: https://issues.apache.org/jira/browse/HIVE-16992
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>            Priority: Major
>         Attachments: HIVE-16992.patch
> LRFU is currently skewed heavily towards LRU; there are 10k-s or 100k-s of 
> buffers tracked during a typical workload, but the heap size is around 700. 
> We should see if making it closer to LFU (by tweaking the lambda) will 
> improve hit rate with small queries infrequently interleaved with large 
> scans; and whether it will have negative effects due to perf overhead.

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