Tim Armstrong created IMPALA-9186:
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Summary: NUMA-awareness for separate join build
Key: IMPALA-9186
URL: https://issues.apache.org/jira/browse/IMPALA-9186
Project: IMPALA
Issue Type: Sub-task
Components: Backend
Reporter: Tim Armstrong
Currently joins are executed by a single thread, so generally the memory
allocations will come from the local NUMA node (assuming the thread stays on
the same NUMA node).
With the separate join build on a NUMA machine, some probe threads will likely
be on a different NUMA node from the build, resulting in inefficiency. This may
not be a major problem because of prefetching, etc, but filing this JIRA to
track the potential issue.
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