MEMORY_TARGET = SGA_TARGET + GREATEST(PGA_AGGREGATE_TARGET, "maximum PGA allocated")


- 밑의 쿼리들을 참조해서 memory_target값 설정

COLUMN name FORMAT A30
COLUMN value FORMAT A10
SELECT name, value
FROM v$parameter
WHERE name IN ('pga_aggregate_target', 'sga_target')
UNION
SELECT 'maximum PGA allocated' AS name, TO_CHAR(value) AS value
FROM v$pgastat
WHERE name = 'maximum PGA allocated';



-- Calculate MEMORY_TARGET

SELECT sga.value + GREATEST(pga.value, max_pga.value) AS memory_target
FROM (SELECT TO_NUMBER(value) AS value FROM v$parameter WHERE name = 'sga_target') sga,
(SELECT TO_NUMBER(value) AS value FROM v$parameter WHERE name = 'pga_aggregate_target') pga,
(SELECT value FROM v$pgastat WHERE name = 'maximum PGA allocated') max_pga;