diff --git a/src/backend/storage/buffer/bufmgr.c b/src/backend/storage/buffer/bufmgr.c
index 71529a1..8984a1d 100644
--- a/src/backend/storage/buffer/bufmgr.c
+++ b/src/backend/storage/buffer/bufmgr.c
@@ -792,7 +792,7 @@ ReadBufferExtended(Relation reln, ForkNumber forkNum, BlockNumber blockNum,
 	 */
 	pgstat_count_buffer_read(reln);
 	/* precache index */
-	if (isPreCacheIndex)
+	if (isPreCacheIndex && preCacheIndexNode == reln->rd_node->relNode)
 	{
 		BlockNumber precacheblocks;
 		precacheblocks = smgrnblocks(eln->rd_smgr, forkNum);