2026-03-12 20:23:15

tpt/lotspios.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:   lotspios.sql
+-- Purpose:     Generate Lots of Physical IOs for testing purposes
+--
+-- Author:      Tanel Poder
+-- Copyright:   (c) http://www.tanelpoder.com
+--              
+-- Usage:       @lotspios <number>
+--              @lotspios 100
+--              @lotspios 1000000
+--          
+-- Other:       This script just does a full table scan on all tables it can
+--              see, thus it generates mainly scattered or direct path reads
+--              
+--------------------------------------------------------------------------------
+
+prompt Generate lots of physical IOs by full scanning through all available tables...
+
+declare
+   str varchar2(1000);
+   x number;
+begin
+
+   for i in 1..&1 loop
+       for t in (select owner, table_name from all_tables where (owner,table_name) not in (select owner,table_name from all_external_tables)) loop
+               begin
+                       execute immediate 'select /*+ FULL(t) */ count(*) from '||t.owner||'.'||t.table_name||' t' into x;
+               exception
+                       when others then null;
+               end;
+       end loop; -- t
+    end loop; -- i
+end;
+/