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Posted to dev@hive.apache.org by "Sergey Shelukhin (JIRA)" <ji...@apache.org> on 2015/04/24 01:16:38 UTC

[jira] [Created] (HIVE-10474) LLAP: investigate why TPCH Q1 1k is slow

Sergey Shelukhin created HIVE-10474:
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             Summary: LLAP: investigate why TPCH Q1 1k is slow
                 Key: HIVE-10474
                 URL: https://issues.apache.org/jira/browse/HIVE-10474
             Project: Hive
          Issue Type: Sub-task
            Reporter: Sergey Shelukhin


While most queries run faster in LLAP than just Tez with container reuse, TPCH Q1 is much slower.
On my run, tez with container reuse (current default LLAP configuration but mode == container and no daemons running) finished in 25.5sec average; with 16 LLAP daemons in default config it finished in 35.5sec; w/the daemons w/o IO elevator (to rule out its impact) it took 59.7sec w/strange distribution (later runs were slower than earlier runs, still, fastest run was 49.5sec).

We need to figure out why this is happening. Is it just slot discrepancy? Regardless, this needs to be addressed.



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