2026-03-12 20:23:15

tpt/smem_detail.sql

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+-- 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:   smem_detail.sql 
+-- Purpose:     Show process memory usage breakdown details - lookup by session ID
+--
+-- Author:      Tanel Poder
+-- Copyright:   (c) http://www.tanelpoder.com
+--              
+-- Usage:       @smem_detail <SID>
+-- 	        
+--	        
+-- Other:       Uses v$process_memory_detail which is available from Oracle 10g
+--              Also, this view is populated with help of an ORADEBUG command
+--              so you must run this script with SYSDBA privileges.
+--
+--              PROOFREAD AND TEST THIS IN A TEST ENVIRONMENT FIRST!
+--
+--------------------------------------------------------------------------------
+
+-- identify target session's process
+SET TERMOUT OFF
+COL pid NEW_VALUE get_pid
+SELECT pid FROM v$process WHERE addr = (SELECT /*+ NO_UNNEST */ paddr FROM v$session WHERE sid = &1);
+COL pid CLEAR
+SET TERMOUT ON
+
+PROMPT
+PROMPT WARNING! About to run an undocumented ORADEBUG command
+PROMPT for getting heap details.
+PROMPT This script is EXPERIMENTAL, use at your own risk!
+PROMPT
+PROMPT Press ENTER to continue, or CTRL+C to cancel
+PAUSE
+
+-- send message to target for memory detail array population
+SET TERMOUT OFF
+ORADEBUG SETMYPID
+ORADEBUG DUMP PGA_DETAIL_GET &get_pid
+SET TERMOUT ON
+
+EXEC DBMS_LOCK.SLEEP(1)
+
+SELECT status FROM v$process_memory_detail_prog WHERE pid = &get_pid; 
+
+PROMPT If the status above is not COMPLETE then you need to wait
+PROMPT for the target process to do some work and re-run the 
+PROMPT v$process_memory_detail query in this script manually
+PROMPT (or just take a heapdump level 29 to get heap breakdown
+PROMPT in a tracefile)
+
+-- 
+SELECT
+    s.sid
+   ,pmd.category
+   ,pmd.name
+   ,pmd.heap_name
+   ,pmd.bytes
+   ,pmd.allocation_count
+--   ,pmd.heap_descriptor
+--   ,pmd.parent_heap_descriptor
+FROM 
+    v$session s
+  , v$process p
+  , v$process_memory_detail pmd
+WHERE
+    s.paddr = p.addr
+AND p.pid = pmd.pid
+AND s.sid IN (&1)
+ORDER BY
+    sid
+  , spid
+  , bytes DESC
+/