diff --git a/spark/src/main/java/org/apache/spark/shuffle/sort/CometShuffleExternalSorter.java b/spark/src/main/java/org/apache/spark/shuffle/sort/CometShuffleExternalSorter.java
index aa806e2e81..ed0cfa9631 100644
--- a/spark/src/main/java/org/apache/spark/shuffle/sort/CometShuffleExternalSorter.java
+++ b/spark/src/main/java/org/apache/spark/shuffle/sort/CometShuffleExternalSorter.java
@@ -257,6 +257,7 @@ private long getMemoryUsage() {
     for (SpillSorter sorter : spillingSorters) {
       totalPageSize += sorter.getMemoryUsage();
     }
+    totalPageSize += activeSpillSorter.getMemoryUsage();
     return totalPageSize;
   }
 
@@ -274,6 +275,7 @@ public long getPeakMemoryUsedBytes() {
   }
 
   private long freeMemory() {
+    updatePeakMemoryUsed();
     long memoryFreed = 0;
     if (isAsync) {
       for (SpillSorter sorter : spillingSorters) {