diff --git a/datafusion/core/src/physical_plan/repartition/mod.rs b/datafusion/core/src/physical_plan/repartition/mod.rs
index c47c9926819b3..c94d2f9b115fa 100644
--- a/datafusion/core/src/physical_plan/repartition/mod.rs
+++ b/datafusion/core/src/physical_plan/repartition/mod.rs
@@ -576,14 +576,21 @@ impl ExecutionPlan for RepartitionExec {
 
             // Get existing ordering:
             let sort_exprs = self.input.output_ordering().unwrap_or(&[]);
-            // Merge streams (while preserving ordering) coming from input partitions to this partition:
+
+            // Merge streams (while preserving ordering) coming from
+            // input partitions to this partition:
+            let fetch = None;
+            let merge_reservation =
+                MemoryConsumer::new(format!("{}[Merge {partition}]", self.name()))
+                    .register(context.memory_pool());
             streaming_merge(
                 input_streams,
                 self.schema(),
                 sort_exprs,
                 BaselineMetrics::new(&self.metrics, partition),
                 context.session_config().batch_size(),
-                None,
+                fetch,
+                merge_reservation,
             )
         } else {
             Ok(Box::pin(RepartitionStream {
diff --git a/datafusion/core/src/physical_plan/sorts/builder.rs b/datafusion/core/src/physical_plan/sorts/builder.rs
index 9deb161a84e16..95975b6e95743 100644
--- a/datafusion/core/src/physical_plan/sorts/builder.rs
+++ b/datafusion/core/src/physical_plan/sorts/builder.rs
@@ -18,8 +18,8 @@
 use arrow::compute::interleave;
 use arrow::datatypes::SchemaRef;
 use arrow::record_batch::RecordBatch;
-use datafusion_execution::memory_pool::MemoryReservation;
 use datafusion_common::Result;
+use datafusion_execution::memory_pool::MemoryReservation;
 
 #[derive(Debug, Copy, Clone, Default)]
 struct BatchCursor {
diff --git a/datafusion/core/src/physical_plan/sorts/merge.rs b/datafusion/core/src/physical_plan/sorts/merge.rs
index ba52afa385021..ecd74f3a33421 100644
--- a/datafusion/core/src/physical_plan/sorts/merge.rs
+++ b/datafusion/core/src/physical_plan/sorts/merge.rs
@@ -30,8 +30,8 @@ use crate::physical_plan::{
 use arrow::datatypes::{DataType, SchemaRef};
 use arrow::record_batch::RecordBatch;
 use arrow_array::*;
-use datafusion_execution::memory_pool::MemoryReservation;
 use datafusion_common::Result;
+use datafusion_execution::memory_pool::MemoryReservation;
 use futures::Stream;
 use std::pin::Pin;
 use std::task::{ready, Context, Poll};
diff --git a/datafusion/core/src/physical_plan/sorts/sort_preserving_merge.rs b/datafusion/core/src/physical_plan/sorts/sort_preserving_merge.rs
index d85858c03b455..6b978b5ee753d 100644
--- a/datafusion/core/src/physical_plan/sorts/sort_preserving_merge.rs
+++ b/datafusion/core/src/physical_plan/sorts/sort_preserving_merge.rs
@@ -20,7 +20,6 @@
 use std::any::Any;
 use std::sync::Arc;
 
-use datafusion_execution::memory_pool::MemoryConsumer;
 use crate::physical_plan::common::spawn_buffered;
 use crate::physical_plan::expressions::PhysicalSortExpr;
 use crate::physical_plan::metrics::{
@@ -31,6 +30,7 @@ use crate::physical_plan::{
     DisplayAs, DisplayFormatType, Distribution, ExecutionPlan, Partitioning,
     SendableRecordBatchStream, Statistics,
 };
+use datafusion_execution::memory_pool::MemoryConsumer;
 
 use arrow::datatypes::SchemaRef;
 use datafusion_common::{DataFusionError, Result};
diff --git a/datafusion/core/src/physical_plan/sorts/stream.rs b/datafusion/core/src/physical_plan/sorts/stream.rs
index f2d94fe583275..a2fa5a91569db 100644
--- a/datafusion/core/src/physical_plan/sorts/stream.rs
+++ b/datafusion/core/src/physical_plan/sorts/stream.rs
@@ -22,8 +22,8 @@ use arrow::array::Array;
 use arrow::datatypes::Schema;
 use arrow::record_batch::RecordBatch;
 use arrow::row::{RowConverter, SortField};
-use datafusion_execution::memory_pool::MemoryReservation;
 use datafusion_common::Result;
+use datafusion_execution::memory_pool::MemoryReservation;
 use futures::stream::{Fuse, StreamExt};
 use std::marker::PhantomData;
 use std::sync::Arc;