Expert Oracle Exadata - Parent Directory

CHAPTER 7 RESOURCE MANAGEMENTplan=> 'nighttime',group_or_subplan => 'OTHER_GROUPS',comment=> 'All other groups not explicitely named in this plan',mgmt_p3 => 100);dbms_resource_manager.validate_pending_area();dbms_resource_manager.submit_pending_area();END;Step 6: Activate the Resource PlanOnce our resource plans are created, one of them must be activated for DBRM to start managingresources. Resource plans are activated by setting the instance parameter RESOURCE_MANAGER_PLAN, usingthe ALTER SYSTEM command. If the plan doesn’t exist, then DBRM is not enabled.ALTER SYSTEM SET resource_manager_plan='DAYTIME' SCOPE=BOTH SID='SCRATCH';You can automatically set the activate resource plan using scheduler windows. This method ensures thatbusiness rules for resource management are enforced consistently. The following listing modifies thebuilt-in scheduler window WEEKNIGHT_WINDOW so that it enables our nighttime resource plan. The windowstarts at 6:00 PM (hour 18) and runs through 7:00 AM (780 minutes).BEGINDBMS_SCHEDULER.SET_ATTRIBUTE(Name => '"SYS"."WEEKNIGHT_WINDOW"',Attribute => 'RESOURCE_PLAN',Value => 'NIGHTTIME');DBMS_SCHEDULER.SET_ATTRIBUTE(name => '"SYS"."WEEKNIGHT_WINDOW"',attribute => 'REPEAT_INTERVAL',value => 'FREQ=WEEKLY;BYDAY=MON,TUE,WED,THU,FRI;BYHOUR=18;BYMINUTE=00;BYSECOND=0');DBMS_SCHEDULER.SET_ATTRIBUTE(name=>'"SYS"."WEEKNIGHT_WINDOW"',attribute=>'DURATION',value=>numtodsinterval(780, 'minute'));DBMS_SCHEDULER.ENABLE(name=>'"SYS"."WEEKNIGHT_WINDOW"');END;Now we’ll create a new window that covers normal business hours, called WEEKDAY_WINDOW. This windowwill automatically switch the active resource plan to our DAYTIME resource plan. The window starts at7:00 AM (hour 7) and runs until 6:00 PM (660 minutes), at which point our WEEKNIGHT_WINDOW begins.189