Tim Armstrong dbb0d863be IMPALA-5160: adjust spill buffer size based on planner estimates ...

Scale down the buffer size in hash joins and hash aggregations if
estimates indicate that the build side of the join is small.
This greatly reduces minimum memory requirements for joins in some
common cases, e.g. small dimension tables.

Currently this is not plumbed through to the backend and only takes
effect in planner tests.

Testing:
Added targeted planner tests for small/mid/large/unknown memory
requirements for aggregations and joins.

Change-Id: I57b5b4c528325d478c8a9b834a6bc5dedab54b5b
Reviewed-on: http://gerrit.cloudera.org:8080/6963
Reviewed-by: Tim Armstrong <tarmstrong@cloudera.com>
Tested-by: Impala Public Jenkins

2017-06-27 20:30:34 +00:00

..

queries/PlannerTest

IMPALA-5160: adjust spill buffer size based on planner estimates

2017-06-27 20:30:34 +00:00

functional-planner_core.csv

Update benchmark tests to run against generic workload, data loading with scale factor, +more

2014-01-08 10:44:22 -08:00

functional-planner_dimensions.csv

Update benchmark tests to run against generic workload, data loading with scale factor, +more

2014-01-08 10:44:22 -08:00

functional-planner_exhaustive.csv

Update benchmark tests to run against generic workload, data loading with scale factor, +more

2014-01-08 10:44:22 -08:00

functional-planner_pairwise.csv

Update benchmark tests to run against generic workload, data loading with scale factor, +more

2014-01-08 10:44:22 -08:00