2026-03-12 20:23:15

tpt/ostackprofw.sql

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+-------------------------------------------------------------------------------------
+--
+-- File name:   oStackProf.sql ( Oradebug short_Stack Profiler )
+-- Purpose:     Take target process stack samples and show an execution profile
+--
+-- Author:      Tanel Poder
+-- 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.
+--              
+-- Usage:       @ostackprof <sid> <interval> <#samples>
+--               	        
+--              @stackprof  <148> <0> <100>
+  
+
+--                - takes 100 stack samples of server process tied to SID 148
+--                  with not waiting between samples
+--
+--              @stackprof  <148> <1> <60>
+  
+
+--                - takes 60 stack samples of process tied to sid 148 with 1
+--                  second interval
+--	        
+-- Other:       WARNING!!! This tool is experimental and not meant for use in
+--                         production environments. This is due oradebug short_stack
+--                         being somewhat unstable on some platforms and it has              
+--                         event crashed target processes on Windows platforms (9.2)
+--
+--                         Use an OS stack sampler instead when need to diagnose
+--                         production issues (and test even those well in dev)
+--
+-- 
+--              Note that this script uses a stack_helper.vbs VB script for post
+--              processing oradebug short_stack output. Therefore you need to run
+--              it on a Windows SQLPLUS client (the server can be on any platforms
+--              as long as it supports oradebug short_stack - 10.2 on Solaris x64
+--              doesn't seem to support it though, but you have DTrace there anyway ;)
+--
+-------------------------------------------------------------------------------------
+
+PROMPT
+PROMPT -- oStackProf v1.01 - EXPERIMENTAL script by Tanel Poder ( http://www.tanelpoder.com )
+PROMPT
+PROMPT WARNING! This script can crash the target process on Oracle 9.2 on Windows
+PROMPT and maybe other versions/platforms as well. Test this script out thorouhgly 
+PROMPT in your dev environment first!
+PAUSE  Hit CTRL+C to cancel, ENTER to continue...
+
+SET TERMOUT OFF FEEDBACK OFF VERIFY OFF
+
+DEF ostackprof_sid=&1
+DEF ostackprof_interval=&2
+DEF ostackprof_samples=&3
+
+COL spid NEW_VALUE ostackprof_spid
+SELECT spid FROM v$process WHERE addr = (SELECT /*+ NO_UNNEST */ paddr FROM v$session WHERE sid = &1);
+COL spid CLEAR
+
+ORADEBUG SETOSPID &ostackprof_spid
+
+SELECT
+    'oradebug short_stack'||
+    DECODE(TO_NUMBER(&ostackprof_interval), 
+        0, '', 
+        chr(13)||chr(10)||'exec dbms_lock.sleep('||TO_CHAR(&ostackprof_interval)||')'
+    ) cmd 
+FROM 
+    (select 1 from dual CONNECT BY level <= &ostackprof_samples)
+.
+
+SPOOL ostackprof_&ostackprof_spid..tmp
+SET HEADING OFF
+PROMPT spool ostackprof_&ostackprof_spid..txt
+/
+PROMPT spool off
+SET HEADING ON
+SPOOL OFF
+
+SET TERMOUT ON
+PROMPT Sampling...
+SET TERMOUT OFF
+@ostackprof_&ostackprof_spid..tmp
+
+SET TERMOUT ON FEEDBACK ON
+
+DEF _nothing="" -- a hack
+PROMPT
+PROMPT Below is the stack prefix common to all samples:
+PROMPT ------------------------------------------------------------------------&_nothing
+PROMPT Frame->function()
+PROMPT ------------------------------------------------------------------------&_nothing
+