SQL>
select
*
from
v$version;
BANNER
--------------------------------------------------------------------------------
Oracle
Database
11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
PL/SQL Release 11.2.0.2.0 - Production
CORE 11.2.0.2.0 Production
TNS
for
IBM/AIX RISC System/6000: Version 11.2.0.2.0 - Production
NLSRTL Version 11.2.0.2.0 - Production
SQL>
SELECT
sid,event
FROM
v$session
WHERE
wait_class#<>6;
SID EVENT
---------- ----------------------------------------------------------------
27 resmgr:cpu quantum
38 resmgr:cpu quantum
43 resmgr:cpu quantum
46 resmgr:cpu quantum
113 resmgr:cpu quantum
118 resmgr:cpu quantum
125 resmgr:cpu quantum
140 resmgr:cpu quantum
143 resmgr:cpu quantum
199 resmgr:cpu quantum
205 resmgr:cpu quantum
SID EVENT
---------- ----------------------------------------------------------------
212 resmgr:cpu quantum
220 resmgr:cpu quantum
221 resmgr:cpu quantum
223 resmgr:cpu quantum
238 resmgr:cpu quantum
241 resmgr:cpu quantum
301 resmgr:cpu quantum
313 resmgr:cpu quantum
314 resmgr:cpu quantum
405 resmgr:cpu quantum
410 resmgr:cpu quantum
SID EVENT
---------- ----------------------------------------------------------------
415 resmgr:cpu quantum
435 resmgr:cpu quantum
502 resmgr:cpu quantum
503 resmgr:cpu quantum
509 resmgr:cpu quantum
510 resmgr:cpu quantum
512 resmgr:cpu quantum
521 resmgr:cpu quantum
526 resmgr:cpu quantum
528 resmgr:cpu quantum
532 resmgr:cpu quantum
SID EVENT
---------- ----------------------------------------------------------------
533 enq: TX - row lock contention
589 resmgr:cpu quantum
596 resmgr:cpu quantum
600 resmgr:cpu quantum
609 resmgr:cpu quantum
611 resmgr:cpu quantum
625 resmgr:cpu quantum
635
null
event
707 resmgr:cpu quantum
727 resmgr:cpu quantum
731 SQL*Net message
to
client
44
rows
selected.
|
查询alert日志
Sat Jun 09 06:00:00 2012
Setting Resource Manager plan SCHEDULER[0x310C]:DEFAULT_MAINTENANCE_PLAN via scheduler window
Setting Resource Manager plan DEFAULT_MAINTENANCE_PLAN via parameter
Sun Jun 10 02:00:00 2012
Closing Resource Manager plan via scheduler window
Clearing Resource Manager plan via parameter
Sun Jun 10 06:00:00 2012
Setting Resource Manager plan DEFAULT_MAINTENANCE_PLAN via parameter
Mon Jun 11 02:00:00 2012
Closing Resource Manager plan via scheduler window
Clearing Resource Manager plan via parameter
Mon Jun 11 22:00:00 2012
Setting Resource Manager plan DEFAULT_MAINTENANCE_PLAN via parameter
Tue Jun 12 02:00:00 2012
Closing scheduler window
Closing Resource Manager plan via scheduler window
Clearing Resource Manager plan via parameter
Tue Jun 12 22:00:00 2012
Setting Resource Manager plan SCHEDULER[0x3108]:DEFAULT_MAINTENANCE_PLAN via scheduler window
Setting Resource Manager plan DEFAULT_MAINTENANCE_PLAN via parameter
Wed Jun 13 02:00:00 2012
Closing scheduler window
Closing Resource Manager plan via scheduler window
Clearing Resource Manager plan via parameter
|
从这里可以看出来，因为SCHEDULER定时启动和关闭资源管理的DEFAULT_MAINTENANCE_PLAN从而导致在晚上10点到2点Resource Manager plan处于启用状态.上线测试刚好在晚上2点之前,所有当时查询的时候发现很多resmgr:cpu quantum等待是因为Resource Manager plan启用导致(使用SCHEDULER控制其启用和关闭),很多情况下数据库跑的应用比较单一，不是十分的需要启动资源管理.
在11g中关闭方法如下
1.
Set
the
current
resource manager plan
to
null
(
or
another plan that
is
not
restrictive):
alter
system
set
resource_manager_plan=
''
scope=both;
2. Change the active windows
to
use the
null
resource manager plan (
or
other nonrestrictive plan) using:
execute
dbms_scheduler.set_attribute(
'WEEKNIGHT_WINDOW'
,
'RESOURCE_PLAN'
,
''
);
execute
dbms_scheduler.set_attribute(
'WEEKEND_WINDOW'
,
'RESOURCE_PLAN'
,
''
);
3.
Then
,
for
each window_name (WINDOW_NAME
from
DBA_SCHEDULER_WINDOWS), run:
execute
dbms_scheduler.set_attribute(
'<window name>'
,
'RESOURCE_PLAN'
,
''
);
SQL>
select
WINDOW_NAME
from
DBA_SCHEDULER_WINDOWS;
WINDOW_NAME
------------------------------
MONDAY_WINDOW
TUESDAY_WINDOW
WEDNESDAY_WINDOW
THURSDAY_WINDOW
FRIDAY_WINDOW
SATURDAY_WINDOW
SUNDAY_WINDOW
WEEKNIGHT_WINDOW
WEEKEND_WINDOW
9
rows
selected.
|