Fix ReorderBufferCheckMemoryLimit() comment.

MasahikoSawada · MasahikoSawada · commit 0125c4e21d7e · 2023-08-02T15:01:13.000+09:00
Commit 7259736 updated the comment but it was not correct since ReorderBufferLargestStreamableTopTXN() returns only top-level transactions. Reviewed-by: Amit Kapila Discussion: https://postgr.es/m/CAD21AoA9XB7OR86BqvrCe2dMYX%2BZv3-BvVmjF%3DGY2z6jN-kqjg%40mail.gmail.com Backpatch-through: 14
diff --git a/src/backend/replication/logical/reorderbuffer.c b/src/backend/replication/logical/reorderbuffer.c
@@ -3602,8 +3602,8 @@ ReorderBufferCheckMemoryLimit(ReorderBuffer *rb)
 			rb->size > 0))
 	{
 		/*
-		 * Pick the largest transaction (or subtransaction) and evict it from
-		 * memory by streaming, if possible.  Otherwise, spill to disk.
+		 * Pick the largest transaction and evict it from memory by streaming,
+		 * if possible.  Otherwise, spill to disk.
 		 */
 		if (ReorderBufferCanStartStreaming(rb) &&
 			(txn = ReorderBufferLargestStreamableTopTXN(rb)) != NULL)
