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As far as I can tell, the query failed to spill because the pre-agg was able to release reservation before the post-agg needed it. Probably there is some variance because of buffering in the exchange. This change slightly reduces the reservation to minimise the chance of this recurring. Also remove a duplicated instance of this test. Change-Id: Ifb8376e2e12d3f73d6c0e27c697be4fc86f9c755 Reviewed-on: http://gerrit.cloudera.org:8080/15339 Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com> Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>