Oracle Session Memory Monitor (PGA Usage)

-- -----------------------------------------------------------------------------------
-- File Name    : https://oracle-base.com/dba/monitoring/monitor_memory.sql
-- Author       : Tim Hall
-- Description  : Displays memory allocations for the current database sessions.
-- Requirements : Access to the V$ views.
-- Call Syntax  : @monitor_memory
-- Last Modified: 15-JUL-2000
-- -----------------------------------------------------------------------------------
SET LINESIZE 200

COLUMN username FORMAT A20
COLUMN module FORMAT A20

SELECT NVL(a.username,'(oracle)') AS username,
       a.module,
       a.program,
       Trunc(b.value/1024) AS memory_kb
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
ORDER BY b.value DESC;