Oracle自動(dòng)收集統(tǒng)計(jì)信息怎么實(shí)現(xiàn)

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這篇文章主要介紹“Oracle 自動(dòng)收集統(tǒng)計(jì)信息怎么實(shí)現(xiàn)”，在日常操作中，相信很多人在 Oracle 自動(dòng)收集統(tǒng)計(jì)信息怎么實(shí)現(xiàn)問(wèn)題上存在疑惑，丸趣 TV 小編查閱了各式資料，整理出簡(jiǎn)單好用的操作方法，希望對(duì)大家解答”O(jiān)racle 自動(dòng)收集統(tǒng)計(jì)信息怎么實(shí)現(xiàn)”的疑惑有所幫助！接下來(lái)，請(qǐng)跟著丸趣 TV 小編一起來(lái)學(xué)習(xí)吧！

在 Oracle 的 11g 版本中提供了統(tǒng)計(jì)數(shù)據(jù)自動(dòng)收集的功能。在部署安裝 11g Oracle 軟件過(guò)程中，其中有一個(gè)步驟便是提示是否啟動(dòng)這個(gè)功能 (默認(rèn)是啟用這個(gè)功能)。

一、查看自動(dòng)收集統(tǒng)計(jì)信息的任務(wù)及狀態(tài)：

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

二、禁止自動(dòng)收集統(tǒng)計(jì)信息的任務(wù)

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

三、啟用自動(dòng)收集統(tǒng)計(jì)信息的任務(wù)

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

四、獲得當(dāng)前自動(dòng)收集統(tǒng)計(jì)信息的執(zhí)行時(shí)間：

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
from dba_scheduler_windows t1,dba_scheduler_wingroup_members t2
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.

其中：WINDOW_NAME：任務(wù)名 REPEAT_INTERVAL：任務(wù)重復(fù)間隔時(shí)間 DURATION：持續(xù)時(shí)間

五. 修改統(tǒng)計(jì)信息執(zhí)行的時(shí)間：

1. 停止任務(wù)：
SQL BEGIN
DBMS_SCHEDULER.DISABLE(
name = SYS . THURSDAY_WINDOW ,
force = TRUE); – 停止任務(wù)是 true
END;
/

SQL

2. 修改任務(wù)的持續(xù)時(shí)間，單位是分鐘：
SQL BEGIN
DBMS_SCHEDULER.SET_ATTRIBUTE(
name = SYS . THURSDAY_WINDOW ,
attribute = DURATION ,
value = numtodsinterval(60, minute
END;
/

3. 開(kāi)始執(zhí)行時(shí)間，BYHOUR=2，表示 2 點(diǎn)開(kāi)始執(zhí)行：
SQL BEGIN
DBMS_SCHEDULER.SET_ATTRIBUTE(
name = SYS . THURSDAY_WINDOW ,
attribute = REPEAT_INTERVAL ,
value = freq=daily;byday=THU;byhour=10;byminute=40;bysecond=0
END;
/

4. 開(kāi)啟任務(wù)：
SQL BEGIN
DBMS_SCHEDULER.ENABLE(
name = SYS . THURSDAY_WINDOW
END;
/

5. 查看修改后的情況：

SQL select t1.window_name,t1.repeat_interval,t1.duration
from dba_scheduler_windows t1,dba_scheduler_wingroup_members t2
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

六. 查看統(tǒng)計(jì)信息執(zhí)行的歷史記錄

– 維護(hù)窗口組
select * from dba_scheduler_window_groups;

– 維護(hù)窗口組對(duì)應(yīng)窗口
select * from dba_scheduler_wingroup_members

– 維護(hù)窗口歷史信息
select* from dba_scheduler_windows

– 查詢(xún)自動(dòng)收集任務(wù)正在執(zhí)行的 job
select * from DBA_AUTOTASK_CLIENT_JOB;

– 查詢(xún)自動(dòng)收集任務(wù)歷史執(zhí)行狀態(tài)
select * from DBA_AUTOTASK_JOB_HISTORY;
select * from DBA_AUTOTASK_CLIENT_HISTORY;

到此，關(guān)于“Oracle 自動(dòng)收集統(tǒng)計(jì)信息怎么實(shí)現(xiàn)”的學(xué)習(xí)就結(jié)束了，希望能夠解決大家的疑惑。理論與實(shí)踐的搭配能更好的幫助大家學(xué)習(xí)，快去試試吧！若想繼續(xù)學(xué)習(xí)更多相關(guān)知識(shí)，請(qǐng)繼續(xù)關(guān)注丸趣 TV 網(wǎng)站，丸趣 TV 小編會(huì)繼續(xù)努力為大家?guī)?lái)更多實(shí)用的文章！

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