2026-03-12 20:23:15

tpt/sampleaddr.sql

@@ -0,0 +1,29 @@
+-- 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:   sampleaddr.sql 
+-- Purpose:     High-frequency sampling of contents of a SGA memory address
+--
+-- Author:      Tanel Poder
+-- Copyright:   (c) http://www.tanelpoder.com
+--              
+-- Usage:       @sampleaddr <hex_addr> <sample_count>
+-- 	        @sampleaddr 
+--	        
+-- Other:       Requires the sample.sql script:
+--
+--                http://www.tanelpoder.com/files/scripts/sample.sql
+--
+--              Also requires access to X$KSMMEM and X$DUAL tables
+--              
+--------------------------------------------------------------------------------
+
+col sampleaddr_addrlen new_value _sampleaddr_addrlen
+
+set termout off
+select vsize(addr)*2 sampleaddr_addrlen from x$dual;
+set termout on
+
+@@sample ksmmmval x$ksmmem "addr=hextoraw(lpad('&1',&_sampleaddr_addrlen,'0'))" &2