rluvaton commented on code in PR #17244:
URL: https://github.com/apache/datafusion/pull/17244#discussion_r2286182169


##########
datafusion/physical-plan/src/sorts/sort.rs:
##########
@@ -720,7 +738,18 @@ impl ExternalSorter {
             Ok(sorted)
         });
 
-        Ok(Box::pin(RecordBatchStreamAdapter::new(schema, stream)))
+        let mut output: SendableRecordBatchStream =
+            Box::pin(RecordBatchStreamAdapter::new(schema, stream));
+
+        if split {
+            output = Box::pin(BatchSplitStream::new(
+                output,
+                self.batch_size,
+                self.metrics.split_metrics.clone(),
+            ));

Review Comment:
   The problem I have with `BatchSplitStream` is that it is not accounting for 
memory that it hold when it hold the batches



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