Java Heap Space Issue in R12

SQL> select instance_name from v$instance;

INSTANCE_NAME
----------------
TEST

SQL> select DEVELOPER_PARAMETERS from apps.FND_CP_SERVICES where SERVICE_ID = (select MANAGER_TYPE from apps.FND_CONCURRENT_QUEUES where CONCURRENT_QUEUE_NAME = 'FNDCPOPP');

DEVELOPER_PARAMETERS
-----------------------------------------------------
J:oracle.apps.fnd.cp.gsf.GSMServiceController:-mx512m


SQL> update FND_CP_SERVICES
set DEVELOPER_PARAMETERS =

'J:oracle.apps.fnd.cp.gsf.GSMServiceController:-mx1024m'

where SERVICE_ID = (select MANAGER_TYPE from FND_CONCURRENT_QUEUES

where CONCURRENT_QUEUE_NAME = 'FNDCPOPP');

1 row updated.

SQL> commit;

Commit complete.

SQL> select DEVELOPER_PARAMETERS from apps.FND_CP_SERVICES where SERVICE_ID = (select MANAGER_TYPE from apps.FND_CONCURRENT_QUEUES where CONCURRENT_QUEUE_NAME = 'FNDCPOPP');

DEVELOPER_PARAMETERS
------------------------------------------------------
J:oracle.apps.fnd.cp.gsf.GSMServiceController:-mx1024m