Hi,

Any help on this would be appreciated.


RDBMS Version: 8.1.7.3.2
Operating System and Version: Windows 2000

Cpu_wait_time shows 0 in v$rsrc_consumer_group


We have implemented Oracle Resource manager in one database environment.
The CPU resource allocation is done in 4 levels. 

SQL> Select plan, group_or_subplan, cpu_p1, cpu_p2, cpu_p3, cpu_p4 From
dba_rsrc_plan_directives Ord 
er by 1, 2, 3, 4, 5; 

PLAN GROUP_OR_SUBPLAN CPU_P1 CPU_P2 CPU_P3 CPU_P4 
------------------------------ ------------------------------ ----------
---------- ---------- ----- 
MARS_APPLICATION_PLAN MARS_HIGH_PRIORITY_GROUP          0 0 60 0 
MARS_APPLICATION_PLAN MARS_LOW_PRIORITY_GROUP           0 0 10 0 
MARS_APPLICATION_PLAN MARS_MEDIUM_PRIORITY_GROUP        0 0 30 0 
MARS_RESOURCE_PLAN MARS_APPLICATION_PLAN                        0 20 0 0

MARS_RESOURCE_PLAN MARS_LOADER_GROUP                    0 80 0 0 
MARS_RESOURCE_PLAN MARS_SYS_GROUP                            100 0 0 0 
MARS_RESOURCE_PLAN OTHER_GROUPS                                 0 0 0
100 

SYSTEM_PLAN LOW_GROUP                                           0 0 100
0 
SYSTEM_PLAN OTHER_GROUPS                                        0 100 0
0 
SYSTEM_PLAN SYS_GROUP                                           100 0 0
0 

10 rows selected. 


When we execute a query after 4 weeks 

1 select name,consumed_cpu_time,cpu_wait_time,cpu_waits,requests 
2* from v$rsrc_consumer_group 
SQL> / 

NAME                            CONSUMED_CPU_TIME CPU_WAIT_TIME
CPU_WAITS REQUESTS 
-------------------------------- ----------------- -------------
---------- ---------- 
MARS_SYS_GROUP                  173796512               0 1701 2199298 
MARS_LOADER_GROUP               194284328               0 64 54614617 
MARS_LOW_PRIORITY_GROUP         38894745                0 49 2315210 
MARS_MEDIUM_PRIORITY_GROUP      1173218366              0 33846 1321363 
MARS_HIGH_PRIORITY_GROUP        385109141               0 2079 619166 
OTHER_GROUPS                    2942                    0 0     342 

6 rows selected. 

Why CPU_WAIT_TIME shows 0 when cumulative CPU_WAITS are many? Oracle
bug? Is CPU_WAITS > 100 is of big concern? 



shreepad
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