Oracle has provided some guidance in checking memory usage per session in your database in metalink note 239846.1 . Here they provide a script which can be used.
Your output will look something like this
SESSION PID/THREAD CURRENT SIZE MAXIMUM SIZE ---------------------------------------- ---------- ---------------- ---------------- 9 - SYS: myworkstation 2258 10.59 MB 10.59 MB 3 - LGWR: testserver 2246 5.71 MB 5.71 MB 2 - DBW0: testserver 2244 2.67 MB 2.67 MB
The script is not part of the official Oracle support scripting and is not an official Oracle script. You can check the latest version of it on Metalink or you can find it below:
REM ============================================================================= REM ************ SCRIPT TO MONITOR MEMORY USAGE BY DATABASE SESSIONS ************ REM ============================================================================= REM Created: 21/march/2003 REM Last update: 28/may/2003 REM REM NAME REM ==== REM MEMORY.sql REM REM AUTHOR REM ====== REM Mauricio Buissa REM REM DISCLAIMER REM ========== REM This script is provided for educational purposes only. It is NOT supported by REM Oracle World Wide Technical Support. The script has been tested and appears REM to work as intended. However, you should always test any script before REM relying on it. REM REM PURPOSE REM ======= REM Retrieves PGA and UGA statistics for users and background processes sessions. REM REM EXECUTION ENVIRONMENT REM ===================== REM SQL*Plus REM REM ACCESS PRIVILEGES REM ================= REM Select on V$SESSTAT, V$SESSION, V$BGPROCESS, V$PROCESS and V$INSTANCE. REM REM USAGE REM ===== REM $ sqlplus "/ as sysdba" @MEMORY REM REM INSTRUCTIONS REM ============ REM Call MEMORY.sql from SQL*Plus, connected as any DBA user. REM Presswhenever you want to refresh information. REM You can change the ordered column and the statistics shown by choosing from the menu. REM Spool files named MEMORY_YYYYMMDD_HH24MISS.lst will be generated in the current directory. REM Every time you refresh screen, a new spool file is created, with a snapshot of the statistics shown. REM These snapshot files may be uploaded to Oracle Support Services for future reference, if needed. REM REM REFERENCES REM ========== REM "Oracle Reference" - Online Documentation REM REM SAMPLE OUTPUT REM ============= REM :::::::::::::::::::::::::::::::::: PROGRAM GLOBAL AREA statistics ::::::::::::::::::::::::::::::::: REM REM SESSION PID/THREAD CURRENT SIZE MAXIMUM SIZE REM -------------------------------------------------- ---------- ------------------ ------------------ REM 9 - SYS: myworkstation 2258 10.59 MB 10.59 MB REM 3 - LGWR: testserver 2246 5.71 MB 5.71 MB REM 2 - DBW0: testserver 2244 2.67 MB 2.67 MB REM ... REM REM :::::::::::::::::::::::::::::::::::: USER GLOBAL AREA statistics :::::::::::::::::::::::::::::::::: REM REM SESSION PID/THREAD CURRENT SIZE MAXIMUM SIZE REM -------------------------------------------------- ---------- ------------------ ------------------ REM 9 - SYS: myworkstation 2258 0.29 MB 0.30 MB REM 5 - SMON: testserver 2250 0.06 MB 0.06 MB REM 4 - CKPT: testserver 2248 0.05 MB 0.05 MB REM ... REM REM SCRIPT BODY REM =========== REM Starting script execution CLE SCR PROMPT . PROMPT . ======== SCRIPT TO MONITOR MEMORY USAGE BY DATABASE SESSIONS ======== PROMPT . REM Setting environment variables SET LINESIZE 200 SET PAGESIZE 500 SET FEEDBACK OFF SET VERIFY OFF SET SERVEROUTPUT ON SET TRIMSPOOL ON COL "SESSION" FORMAT A50 COL "PID/THREAD" FORMAT A10 COL " CURRENT SIZE" FORMAT A18 COL " MAXIMUM SIZE" FORMAT A18 REM Setting user variables values SET TERMOUT OFF DEFINE sort_order = 3 DEFINE show_pga = 'ON' DEFINE show_uga = 'ON' COL sort_column NEW_VALUE sort_order COL pga_column NEW_VALUE show_pga COL uga_column NEW_VALUE show_uga COL snap_column NEW_VALUE snap_time SELECT nvl(:sort_choice, 3) "SORT_COLUMN" FROM dual / SELECT nvl(:pga_choice, 'ON') "PGA_COLUMN" FROM dual / SELECT nvl(:uga_choice, 'ON') "UGA_COLUMN" FROM dual / SELECT to_char(sysdate, 'YYYYMMDD_HH24MISS') "SNAP_COLUMN" FROM dual / REM Creating new snapshot spool file SPOOL MEMORY_&snap_time REM Showing PGA statistics for each session and background process SET TERMOUT &show_pga PROMPT PROMPT :::::::::::::::::::::::::::::::::: PROGRAM GLOBAL AREA statistics ::::::::::::::::::::::::::::::::: SELECT to_char(ssn.sid, '9999') || ' - ' || nvl(ssn.username, nvl(bgp.name, 'background')) || nvl(lower(ssn.machine), ins.host_name) "SESSION", to_char(prc.spid, '999999999') "PID/THREAD", to_char((se1.value/1024)/1024, '999G999G990D00') || ' MB' " CURRENT SIZE", to_char((se2.value/1024)/1024, '999G999G990D00') || ' MB' " MAXIMUM SIZE" FROM v$sesstat se1, v$sesstat se2, v$session ssn, v$bgprocess bgp, v$process prc, v$instance ins, v$statname stat1, v$statname stat2 WHERE se1.statistic# = stat1.statistic# and stat1.name = 'session pga memory' AND se2.statistic# = stat2.statistic# and stat2.name = 'session pga memory max' AND se1.sid = ssn.sid AND se2.sid = ssn.sid AND ssn.paddr = bgp.paddr (+) AND ssn.paddr = prc.addr (+) ORDER BY &sort_order DESC / REM Showing UGA statistics for each session and background process SET TERMOUT &show_uga PROMPT PROMPT :::::::::::::::::::::::::::::::::::: USER GLOBAL AREA statistics :::::::::::::::::::::::::::::::::: SELECT to_char(ssn.sid, '9999') || ' - ' || nvl(ssn.username, nvl(bgp.name, 'background')) || nvl(lower(ssn.machine), ins.host_name) "SESSION", to_char(prc.spid, '999999999') "PID/THREAD", to_char((se1.value/1024)/1024, '999G999G990D00') || ' MB' " CURRENT SIZE", to_char((se2.value/1024)/1024, '999G999G990D00') || ' MB' " MAXIMUM SIZE" FROM v$sesstat se1, v$sesstat se2, v$session ssn, v$bgprocess bgp, v$process prc, v$instance ins, v$statname stat1, v$statname stat2 WHERE se1.statistic# = stat1.statistic# and stat1.name = 'session uga memory' AND se2.statistic# = stat2.statistic# and stat2.name = 'session uga memory max' AND se1.sid = ssn.sid AND se2.sid = ssn.sid AND ssn.paddr = bgp.paddr (+) AND ssn.paddr = prc.addr (+) ORDER BY &sort_order DESC / REM Showing sort information SET TERMOUT ON PROMPT BEGIN IF (&sort_order = 1) THEN dbms_output.put_line('Ordered by SESSION'); ELSIF (&sort_order = 2) THEN dbms_output.put_line('Ordered by PID/THREAD'); ELSIF (&sort_order = 3) THEN dbms_output.put_line('Ordered by CURRENT SIZE'); ELSIF (&sort_order = 4) THEN dbms_output.put_line('Ordered by MAXIMUM SIZE'); END IF; END; / REM Closing current snapshot spool file SPOOL OFF REM Showing the menu and getting sort order and information viewing choice PROMPT PROMPT Choose the column you want to sort: == OR == You can choose which information to see: PROMPT ... 1. Order by SESSION ... 5. PGA and UGA statistics (default) PROMPT ... 2. Order by PID/THREAD ... 6. PGA statistics only PROMPT ... 3. Order by CURRENT SIZE (default) ... 7. UGA statistics only PROMPT ... 4. Order by MAXIMUM SIZE PROMPT ACCEPT choice NUMBER PROMPT 'Enter the number of your choice or press to refresh information: ' VAR sort_choice NUMBER VAR pga_choice CHAR(3) VAR uga_choice CHAR(3) BEGIN IF (&choice = 1 OR &choice = 2 OR &choice = 3 OR &choice = 4) THEN :sort_choice := &choice; :pga_choice := '&show_pga'; :uga_choice := '&show_uga'; ELSIF (&choice = 5) THEN :sort_choice := &sort_order; :pga_choice := 'ON'; :uga_choice := 'ON'; ELSIF (&choice = 6) THEN :sort_choice := &sort_order; :pga_choice := 'ON'; :uga_choice := 'OFF'; ELSIF (&choice = 7) THEN :sort_choice := &sort_order; :pga_choice := 'OFF'; :uga_choice := 'ON'; ELSE :sort_choice := &sort_order; :pga_choice := '&show_pga'; :uga_choice := '&show_uga'; END IF; END; / REM Finishing script execution PROMPT Type "@MEMORY" and press SET FEEDBACK ON SET VERIFY ON SET SERVEROUTPUT OFF SET TRIMSPOOL OFF REM ============= REM END OF SCRIPT REM =============
1 comment:
Hi, you can compile this program in C to find oracle process memory usage
http://ejemplosprogramacionc.blogspot.com/2013/06/memoria-de-procesos-oracle-sobre.html
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