1. Download the particular patch file
2. Check the file ..\
3. If the following entry is present
(instance_shutdown) true (/instance_shutdown)
then it requires downtime.
COLUMN CORRID FORMAT A55;
COLUMN STATE FORMAT A14;
SELECT CORRID,DECODE(STATE, 0, '0 = READY', 1, '1 = DELAYED', 2, '2 = PROCESSED', 3, '3 = EXCEPTION',TO_CHAR(STATE)) STATE, COUNT(*) COUNT
FROM WF_DEFERRED
GROUP BY CORRID, STATE;
SET LINES 150
COLUMN CORRID FORMAT A55;
COLUMN STATE FORMAT A14;
SELECT CORRID,DECODE(STATE, 0, '0 = READY', 1, '1 = DELAYED', 2, '2 = PROCESSED', 3, '3 =
EXCEPTION',TO_CHAR(STATE)) STATE, COUNT(*) COUNT
FROM WF_NOTIFICATION_OUT
GROUP BY CORRID, STATE;
COL COMPONENT_NAME FORMAT A60
COL COMPONENT_STATUS FORMAT A20
COL STARTUP_MODE FORMAT A20
SET LINES 120
SET PAGES 1000
SELECT COMPONENT_NAME, COMPONENT_STATUS, STARTUP_MODE FROM FND_SVC_COMPONENTS;
SET LINES 160
COL COMPONENT_NAME FORMAT A30
COL PARAMETER_NAME FORMAT A40
COL PARAMETER_VALUE FORMAT A40
SELECT A.COMPONENT_ID, A.COMPONENT_NAME, B.PARAMETER_ID, C.PARAMETER_NAME, B.PARAMETER_VALUE
FROM FND_SVC_COMPONENTS A, FND_SVC_COMP_PARAM_VALS B, FND_SVC_COMP_PARAMS_B C
WHERE A.COMPONENT_ID = B.COMPONENT_ID AND B.PARAMETER_ID = C.PARAMETER_ID
AND UPPER(A.COMPONENT_NAME) LIKE '%MAILER%'
ORDER BY A.COMPONENT_ID, A.COMPONENT_NAME, C.PARAMETER_NAME;

Hello,
You will find on some useful information on Oracle product and Oracle Application's
Ramesh Mani
Senior Apps Consultant