diff --git a/src/backend/replication/logical/reorderbuffer.c b/src/backend/replication/logical/reorderbuffer.c
index c27f710053..c04fe1cf4b 100644
--- a/src/backend/replication/logical/reorderbuffer.c
+++ b/src/backend/replication/logical/reorderbuffer.c
@@ -1369,7 +1369,7 @@ ReorderBufferIterTXNNext(ReorderBuffer *rb, ReorderBufferIterTXNState *state)
 		 * Update the total bytes processed before releasing the current set
 		 * of changes and restoring the new set of changes.
 		 */
-		rb->totalBytes += rb->size;
+		rb->totalBytes += entry->txn->size;
 		if (ReorderBufferRestoreChanges(rb, entry->txn, &entry->file,
 										&state->entries[off].segno))
 		{
@@ -2382,7 +2382,7 @@ ReorderBufferProcessTXN(ReorderBuffer *rb, ReorderBufferTXN *txn,
 		if (!rbtxn_is_streamed(txn))
 			rb->totalTxns++;
 
-		rb->totalBytes += rb->size;
+		rb->totalBytes += txn->total_size;
 
 		/*
 		 * Done with current changes, send the last message for this set of
@@ -3073,7 +3073,7 @@ ReorderBufferChangeMemoryUpdate(ReorderBuffer *rb,
 {
 	Size		sz;
 	ReorderBufferTXN *txn;
-	ReorderBufferTXN *toptxn = NULL;
+	ReorderBufferTXN *toptxn;
 
 	Assert(change->txn);
 
@@ -3087,14 +3087,14 @@ ReorderBufferChangeMemoryUpdate(ReorderBuffer *rb,
 
 	txn = change->txn;
 
-	/* If streaming supported, update the total size in top level as well. */
-	if (ReorderBufferCanStream(rb))
-	{
-		if (txn->toptxn != NULL)
-			toptxn = txn->toptxn;
-		else
-			toptxn = txn;
-	}
+	/*
+	 * Update the total size in top level as well. This is later used to
+	 * compute the decoding stats.
+	 */
+	if (txn->toptxn != NULL)
+		toptxn = txn->toptxn;
+	else
+		toptxn = txn;
 
 	sz = ReorderBufferChangeSize(change);
 
@@ -3104,8 +3104,7 @@ ReorderBufferChangeMemoryUpdate(ReorderBuffer *rb,
 		rb->size += sz;
 
 		/* Update the total size in the top transaction. */
-		if (toptxn)
-			toptxn->total_size += sz;
+		toptxn->total_size += sz;
 	}
 	else
 	{
@@ -3114,8 +3113,7 @@ ReorderBufferChangeMemoryUpdate(ReorderBuffer *rb,
 		rb->size -= sz;
 
 		/* Update the total size in the top transaction. */
-		if (toptxn)
-			toptxn->total_size -= sz;
+		toptxn->total_size -= sz;
 	}
 
 	Assert(txn->size <= rb->size);