2026-03-12 20:23:15

tpt/demos/kghupr1.sql

@@ -0,0 +1,48 @@
+-- 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:   demos/kghupr1.sql
+--
+-- Purpose:     Advanced Oracle Troubleshooting Seminar demo script
+--
+-- Author:      Tanel Poder ( http://www.tanelpoder.com )
+--
+-- Copyright:   (c) 2007-2009 Tanel Poder
+--
+--------------------------------------------------------------------------------
+
+col laddr new_value laddr
+col wordsize new_value wordsize
+
+alter system flush shared_pool;
+
+select addr laddr, vsize(addr) wordsize 
+from   v$latch_children 
+where  gets + immediate_gets >= (
+               select max(gets+immediate_gets)
+               from v$latch_children
+               where name = 'shared pool'
+)
+and name = 'shared pool'
+/
+
+-- oradebug watch 0x&laddr &wordsize self
+
+alter session set session_cached_cursors = 0;
+alter session set "_close_cached_open_cursors"=true;
+
+prompt Running lots of soft parses. Use latchprofx on my SID in another session
+
+declare
+    x number;
+begin
+    for i in 1..10000000 loop
+    	execute immediate 'select count(*) from dual where rownum = 1';
+    end loop;
+end;
+/
+
+col laddr clear
+col wordsize clear