SQL sorgusu PGA üzerinde ne kadar bellek tüketir.

Soru : Bir SQL sorgusunun PGA üzerinde harcağı bellek miktarını nasıl öğrenirim ?

  SELECT NVL (a.username, '(oracle)') AS USER,
         a.module                   AS MODULE,
         a.program                  AS PROGRAM,
         a.SID,
         TRUNC (b.VALUE / 1024)     AS memory_kb,
         sql_id,
         LOGON_TIME                 AS SESSION_LOGON,
         PREV_EXEC_START            AS "LAST EXECUTED "
    FROM v$session a, v$sesstat b, v$statname c
   WHERE     a.sid = b.sid
         AND b.statistic# = c.statistic#
         AND c.name = 'session pga memory'
         AND a.program IS NOT NULL
         AND SQL_ID = 'xxxxxxxxxxxx'
ORDER BY b.VALUE DESC;