Tim Armstrong created IMPALA-7349:
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Summary: Automatically choose mem_limit based on estimate, clamped
to range
Key: IMPALA-7349
URL: https://issues.apache.org/jira/browse/IMPALA-7349
Project: IMPALA
Issue Type: Sub-task
Components: Backend
Reporter: Tim Armstrong
Assignee: Bikramjeet Vig
We should add admission control support for intelligently choosing how much
memory to give a query, based on the memory estimate. Currently we require that
you set a single mem_limit per pool. Instead it would be better if we allowed
configuring min/max guardrails within which admission control chose an amount
of memory that will allow good performance.
Initially, I think mem_limit will be the same for all backends. Eventually it
could make sense to have different limits per backend depending on the
fragments.
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