mbutrovich commented on code in PR #1440:
URL: https://github.com/apache/datafusion-comet/pull/1440#discussion_r1972468486
##########
native/core/src/execution/shuffle/shuffle_writer.rs:
##########
@@ -1076,6 +1053,146 @@ mod test {
shuffle_write_test(10000, 100, 200, Some(10 * 1024 * 1024));
}
+ #[test]
+ fn partition_buffer_memory() {
+ let batch = create_batch(900);
+ let runtime_env = create_runtime(128 * 1024);
+ let mut buffer = PartitionBuffer::try_new(
+ batch.schema(),
+ 1024,
+ 0,
+ &runtime_env,
+ CompressionCodec::Lz4Frame,
+ true,
+ )
+ .unwrap();
+ let metrics_set = ExecutionPlanMetricsSet::new();
+ let metrics = ShuffleRepartitionerMetrics::new(&metrics_set, 0);
+ let indices: Vec<usize> = (0..batch.num_rows()).collect();
+
+ assert_eq!(0, buffer.reservation.size());
+ assert!(buffer.spill_file.is_none());
+
+ // append first batch - should fit in memory
+ let status = buffer.append_rows(batch.columns(), &indices, 0,
&metrics);
+ assert_eq!(
+ format!("{status:?}"),
+ format!("{:?}", AppendRowStatus::MemDiff(Ok(106496)))
+ );
+ assert_eq!(900, buffer.num_active_rows);
+ assert_eq!(106496, buffer.reservation.size());
+ assert_eq!(0, buffer.frozen.len());
+ assert!(buffer.spill_file.is_none());
+
+ // append second batch - should trigger flush to frozen bytes
+ let status = buffer.append_rows(batch.columns(), &indices, 0,
&metrics);
+ assert_eq!(
+ format!("{status:?}"),
+ format!("{:?}", AppendRowStatus::MemDiff(Ok(126316)))
+ );
+ assert_eq!(0, buffer.num_active_rows);
+ assert_eq!(9914, buffer.frozen.len());
+ // note that the reservation does not include the frozen bytes
+ assert_eq!(106496, buffer.reservation.size());
+ assert!(buffer.spill_file.is_none());
+
+ // spill
+ buffer.spill(&runtime_env, &metrics).unwrap();
+ assert_eq!(0, buffer.num_active_rows);
+ assert_eq!(0, buffer.frozen.len());
+ assert_eq!(0, buffer.reservation.size());
+ assert!(buffer.spill_file.is_some());
Review Comment:
`assert_eq!(9914, buffer.spill_file.as_ref().unwrap().file.len())`? That's
the frozen buffer length above.
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