Github user ppadma commented on a diff in the pull request: https://github.com/apache/drill/pull/1101#discussion_r166096630 --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/aggregate/HashAggTemplate.java --- @@ -215,6 +206,7 @@ public BatchHolder() { MaterializedField outputField = materializedValueFields[i]; // Create a type-specific ValueVector for this value vector = TypeHelper.getNewVector(outputField, allocator); + int columnSize = new RecordBatchSizer.ColumnSize(vector).estSize; --- End diff -- there is already stdSize which is kind of doing the same thing. can we use that instead of knownSize ?
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