2026-03-12 20:23:15

tpt/prefetch.sql

@@ -0,0 +1,38 @@
+-- Copyright 2018 Tanel Poder. All rights reserved. More info at http://tanelpoder.com
+-- Licensed under the Apache License, Version 2.0. See LICENSE.txt for terms & conditions.
+
+--------------------------------------------------------------------------------
+--
+-- File name:   prefetch.sql   
+-- Purpose:     Show KCB layer prefetch 
+--
+-- Author:      Tanel Poder
+-- Copyright:   (c) http://www.tanelpoder.com
+--              
+-- Usage:       
+-- 	        
+--	        
+-- Other:       
+--              
+--              
+--
+--------------------------------------------------------------------------------
+col "BLOCKS/OP" for 999.9
+
+select
+    p.id
+  , p.name
+  , p.block_size
+  , pf.timestamp
+  , pf.prefetch_ops ops
+  , pf.prefetch_blocks blocks
+  , pf.prefetch_blocks / pf.prefetch_ops "BLOCKS/OP"
+from
+    X$KCBKPFS pf
+  , v$buffer_pool p
+where
+    pf.BUFFER_POOL_ID = p.id
+and pf.prefetch_ops > 0
+order by
+    pf.timestamp
+/