Oracle 11g 의 자동 통계 수집
25435 단어 oracle 11g
1. 통계 정 보 를 자동 으로 수집 하 는 작업 과 상 태 를 조회 합 니 다.
SQL> select client_name,status from dba_autotask_client;
CLIENT_NAME STATUS
---------------------------------------------------------------- --------
auto optimizer stats collection ENABLED
auto space advisor ENABLED
sql tuning advisor DISABLED
SQL>
2. 통계 정 보 를 자동 으로 수집 하 는 것 을 금지 하 는 임무
SQL> exec DBMS_AUTO_TASK_ADMIN.DISABLE(client_name => 'auto optimizer stats collection',operation => NULL,window_name => NULL);
PL/SQL procedure successfully completed.
SQL> select client_name,status from dba_autotask_client;
CLIENT_NAME STATUS
---------------------------------------------------------------- --------
auto optimizer stats collection DISABLED
auto space advisor ENABLED
sql tuning advisor DISABLED
SQL>
3. 통계 정 보 를 자동 으로 수집 하 는 작업 사용
SQL> exec DBMS_AUTO_TASK_ADMIN.ENABLE(client_name => 'auto optimizer stats collection',operation => NULL,window_name => NULL);
PL/SQL procedure successfully completed.
SQL> select client_name,status from dba_autotask_client;
CLIENT_NAME STATUS
---------------------------------------------------------------- --------
auto optimizer stats collection ENABLED
auto space advisor ENABLED
sql tuning advisor DISABLED
SQL>
4. 현재 자동 으로 통계 정 보 를 수집 하 는 실행 시간:
SQL> col WINDOW_NAME format a20
SQL> col REPEAT_INTERVAL format a70
SQL> col DURATION format a20
SQL> set line 180
SQL> select t1.window_name,t1.repeat_interval,t1.duration
2 from dba_scheduler_windows t1,dba_scheduler_wingroup_members t2
3 where t1.window_name=t2.window_name and t2.window_group_name in ('MAINTENANCE_WINDOW_GROUP','BSLN_MAINTAIN_STATS_SCHED');
WINDOW_NAME REPEAT_INTERVAL DURATION
-------------------- ---------------------------------------------------------------------- --------------------
WEDNESDAY_WINDOW freq=daily;byday=WED;byhour=22;byminute=0; bysecond=0 +000 04:00:00
SATURDAY_WINDOW freq=daily;byday=SAT;byhour=6;byminute=0; bysecond=0 +000 20:00:00
THURSDAY_WINDOW freq=daily;byday=THU;byhour=22;byminute=0; bysecond=0 +000 04:00:00
TUESDAY_WINDOW freq=daily;byday=TUE;byhour=22;byminute=0; bysecond=0 +000 04:00:00
SUNDAY_WINDOW freq=daily;byday=SUN;byhour=6;byminute=0; bysecond=0 +000 20:00:00
MONDAY_WINDOW freq=daily;byday=MON;byhour=22;byminute=0; bysecond=0 +000 04:00:00
FRIDAY_WINDOW freq=daily;byday=FRI;byhour=22;byminute=0; bysecond=0 +000 04:00:00
7 rows selected.
SQL>
그 중: WINDOWNAME: 미 션 이름 REPEAT_INTERVAL: 작업 반복 간격 DURATION: 지속 시간
5. 통계 정 보 를 수정 하여 실행 하 는 시간:
1. :
SQL> BEGIN
2 DBMS_SCHEDULER.DISABLE(
3 name => '"SYS"."THURSDAY_WINDOW"',
4 force => TRUE); -- true
5 END;
6 /
SQL>
2. , :
SQL> BEGIN
2 DBMS_SCHEDULER.SET_ATTRIBUTE(
3 name => '"SYS"."THURSDAY_WINDOW"',
4 attribute => 'DURATION',
5 value => numtodsinterval(60,'minute'));
6 END;
7 /
SQL>
3. ,BYHOUR=2, 2 :
SQL> BEGIN
2 DBMS_SCHEDULER.SET_ATTRIBUTE(
3 name => '"SYS"."THURSDAY_WINDOW"',
4 attribute => 'REPEAT_INTERVAL',
5 value => 'freq=daily;byday=THU;byhour=10;byminute=40;bysecond=0');
6 END;
7 /
SQL>
4. :
SQL> BEGIN
2 DBMS_SCHEDULER.ENABLE(
3 name => '"SYS"."THURSDAY_WINDOW"');
4 END;
5 /
SQL>
5. :
SQL> select t1.window_name,t1.repeat_interval,t1.duration
2 from dba_scheduler_windows t1,dba_scheduler_wingroup_members t2
3 where t1.window_name=t2.window_name and t2.window_group_name in ('MAINTENANCE_WINDOW_GROUP','BSLN_MAINTAIN_STATS_SCHED');
WINDOW_NAME REPEAT_INTERVAL DURATION
-------------------- ---------------------------------------------------------------------- --------------------
WEDNESDAY_WINDOW freq=daily;byday=WED;byhour=22;byminute=0; bysecond=0 +000 04:00:00
SATURDAY_WINDOW freq=daily;byday=SAT;byhour=6;byminute=0; bysecond=0 +000 20:00:00
THURSDAY_WINDOW freq=daily;byday=THU;byhour=10;byminute=40;bysecond=0 +000 01:00:00
TUESDAY_WINDOW freq=daily;byday=TUE;byhour=22;byminute=0; bysecond=0 +000 04:00:00
SUNDAY_WINDOW freq=daily;byday=SUN;byhour=6;byminute=0; bysecond=0 +000 20:00:00
MONDAY_WINDOW freq=daily;byday=MON;byhour=22;byminute=0; bysecond=0 +000 04:00:00
FRIDAY_WINDOW freq=daily;byday=FRI;byhour=22;byminute=0; bysecond=0 +000 04:00:00
SQL>
6. 통계 정보 가 실 행 된 기록 보기
--
select * from dba_scheduler_window_groups;
--
select * from dba_scheduler_wingroup_members
--
select* from dba_scheduler_windows
-- job
select * from DBA_AUTOTASK_CLIENT_JOB;
--
select * from DBA_AUTOTASK_JOB_HISTORY;
select * from DBA_AUTOTASK_CLIENT_HISTORY;
-- 인터넷 정리