very sequential reads after apply PTF
I applyed the following patches at O.S. level
HIPER LVL 126
DB2 LVL 17
JAVA LVL 17
after this applyed, the cache optimizer was reset.
since this applyed the system have many sequential reads, and the performance is very low.
I check the ST04 and the data here is blank, I not activate the dbmon because i am affraid this cause problem in system performance (i have DB with 5 TB size).
I open a PMR at IBM, but them say the server is OK.