sqlplus> select * from v$sgastat where name = 'free memory';
POOL NAME BYTES
------------ -------------------------- ----------
shared pool free memory 243958752
large pool free memory 244376096
java pool free memory 16777216
Verificando o tamanho em MB.
select pool, name, bytes, round(bytes/(1024*1024)) from v$sgastat where name = 'free memory'
POOL NAME BYTES ROUND(BYTES/(1024*1024))
------------ -------------------------- ---------- ------------------------
shared pool free memory 243888232 233
large pool free memory 244376096 233
java pool free memory 16777216 16