Github user Ben-Zvi commented on a diff in the pull request:
https://github.com/apache/drill/pull/1101#discussion_r171130622
--- Diff: exec/java-exec/src/main/resources/drill-module.conf ---
@@ -427,8 +427,8 @@ drill.exec.options: {
exec.enable_union_type: false,
exec.errors.verbose: false,
exec.hashagg.mem_limit: 0,
- exec.hashagg.min_batches_per_partition: 2,
- exec.hashagg.num_partitions: 32,
+ exec.hashagg.min_batches_per_partition: 1,
--- End diff --
This option was meant to create a "slack". **1** is the lowest value -
requiring only 1 batch per each partition, i.e., no slack; so that requires the
memory computations to be more precise now !!
---
