Working out the total memory consumed by a process

Question

Hi,
I am writing a general snapshot utility that provides session statistics. The code is as follows:
set pagesize 9999
set linesize 140
set heading off
select SUBSTR(name,1,8) || ' sessions as on '||TO_CHAR(CURRENT_DATE, 'MON DD YYYY HH:MI AM') from v$database;
set heading on
column spid heading "OS PID" format a6
column process format a13 heading "Client ProcID"
column username  format a10
column sid       format 999
column serial#   format 99999
column STATUS    format a3 HEADING 'ACT'
column last      format 9,999.99
column TotGets   format 999,999,999,999 HEADING 'Logical I/O'
column phyRds    format 999,999 HEADING 'Physical I/O'
column total_memory format 999,999 HEADING 'MEM/KB'
SELECT
          substr(a.username,1,8) "lOGIN"
        , substr(a.sid,1,5) || '/'||substr(a.serial#,1,5) AS "SID/serial#"
        , TO_CHAR(a.logon_time, 'DD/MM HH:MI') "LOGGED IN SINCE"
        , substr(a.machine,1,10) HOST
        , substr(p.username,1,8)||'/'||substr(p.spid,1,5) "OS PID"
        , substr(a.osuser,1,8)||'/'||substr(a.process,1,5) "Client PID"
        , substr(a.program,1,15) PROGRAM
        --,ROUND((CURRENT_DATE-a.logon_time)*24) AS "Logged/Hours"
                select round(sum(ss.value)/1024) from v$sesstat ss, v$statname sn
                where ss.sid = a.sid and
                        sn.statistic# = ss.statistic# and
                        sn.name in ('session pga memory','session uga memory')
          ) AS total_memory
        , (b.block_gets + b.consistent_gets) TotGets
        , b.physical_reads phyRds
        , decode(a.status, 'ACTIVE', 'Y','INACTIVE', 'N') STATUS
        , CASE WHEN a.sid in (select sid from v$mystat where rownum = 1) THEN '<-- YOU' ELSE ' ' END "INFO"
FROM
         v$process p
        ,v$session a
        ,v$sess_io b
WHERE
a.paddr = p.addr
AND p.background IS NULL
--AND  a.sid NOT IN (select sid from v$mystat where rownum = 1)
AND a.sid = b.sid
AND a.username is not null
--AND (a.last_call_et < 3600 or a.status = 'ACTIVE')
--AND CURRENT_DATE - logon_time > 0
--AND a.sid NOT IN ( select sid from v$mystat where rownum=1)  -- exclude me
--AND (b.block_gets + b.consistent_gets) > 0
ORDER BY a.username;
exitIn above I am trying to display a row per process so I have to cut the width of the columns. However, for the total memory consumed I assumed that it is the sum of values from v$sessstat as follows:
                select round(sum(ss.value)/1024) from v$sesstat ss, v$statname sn
                where ss.sid = a.sid and
                        sn.statistic# = ss.statistic# and
                        sn.name in ('session pga memory','session uga memory')
          ) AS total_memoryI have looked around and I think many refer to the sum of 'session pga memory' + ''session uga memory' as something workable.
I therefore appreciate any comments on that and also anything that I can improve in this piece of code.
Regards,
Mich

Answer 1

I don't know why this thread appears with the Aug 19 2001. This issue was posted Sept 9 2004.