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  1. IMPALA
  2. IMPALA-6460

More flexible memory-based admission control policies

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    • Memory-based admission control policies
    • ghx-label-8

    Description

      Currently there are only two ways to decided how much memory to reserve for each query in memory-based admission control:

      • Using the memory estimates, which often makes bad decisions (e.g. huge overestimates) and doesn't have any enforcement on the backend
      • Using a static pool or user-set mem_limit, which is very difficult to set to a reasonable value for all queries.

      The memory reservation work will allow us to come up with more powerful and flexible polices

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            tarmstrong Tim Armstrong
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