[oracle@node3 /]$ su - oracle

[oracle@node3 ~]$ sqlplus system/[email protected]/orcl

SQL*Plus: Release 11.2.0.4.0 Production on Sun Oct 9 14:16:59 2016

Copyright (c) 1982, 2013, Oracle. All rights reserved.

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,

Data Mining and Real Application Testing options

SQL> exec dbms_workload_repository.create_snapshot(); (loadrunner 開始跑壓力測試腳本後，通過這句話手動創建Snapshots ，此時生產一個id ，大致記住當前時間，在後面會用到)

PL/SQL procedure successfully completed.

SQL> exec dbms_workload_repository.create_snapshot(); (loadrunner 結束跑壓力測試腳本後，通過這句話再手動創建

（後面會取這兩個id之間的值，作為html報告生成。）

PL/SQL procedure successfully completed.

SQL> @?/rdbms/admin/awrrpt.sql

Current Instance

~~~~~~~~~~~~~~~~

DB Id DB Name Inst Num Instance

----------- ------------ -------- ------------

787750339 LTDB 1 ltdb1

Specify the Report Type

~~~~~~~~~~~~~~~~~~~~~~~

Would you like an HTML report, or a plain text report?

Enter 'html' for an HTML report, or 'text' for plain text

Defaults to 'html'

Enter value for report_type: （回車）

Type Specified: html

Instances in this Workload Repository schema

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

DB Id Inst Num DB Name Instance Host

------------ -------- ------------ ------------ ------------

* 787750339 1 LTDB ltdb1 node1

787750339 2 LTDB ltdb2 node2

Using 787750339 for database Id

Using 1 for instance number

Specify the number of days of snapshots to choose from

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Entering the number of days (n) will result in the most recent

(n) days of snapshots being listed. Pressing <return> without

specifying a number lists all completed snapshots.

Enter value for num_days: （回車）

Listing all Completed Snapshots

Instance DB Name Snap Id Snap Started Level

------------ ------------ --------- ------------------ -----

ltdb1 LTDB 1412 08 Oct 2016 11:00 1

1429 09 Oct 2016 13:04 1

1430 09 Oct 2016 13:35 1

1431 09 Oct 2016 13:35 1

1432 09 Oct 2016 13:51 1

1433 09 Oct 2016 14:07 1

1434 09 Oct 2016 14:17 1

Specify the Begin and End Snapshot Ids

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Enter value for begin_snap: （1433 從上面的列表選出來的。 ）（基本上是取最後兩個id ， 因為上面也是手動創建過兩次Snapshots）

Enter value for end_snap: 1434（1434 從上面的列表選出來的。 ）

End Snapshot Id specified: 1434

Specify the Report Name

~~~~~~~~~~~~~~~~~~~~~~~

The default report file name is awrrpt_1_1431_1434.html. To use this name,

press <return> to continue, otherwise enter an alternative.

Enter value for report_name: （默認報告的名字。路徑是/home/orace/ awrrpt_1_1431_1434.html） 回車後就生產報告了。

/export/home/oracle

報告裏需要關註的點：主要就是sql腳本執行時間， 這裏需要開發調優。

第三列：表示執行該sql所用的時間，如果時間長了需要優化。

簡單介紹：

--如果需要的話DBA可以通過DBMS_WORKLOAD_REPOSITORY過程手動創建、刪除或修改snapshots.

--提示調用DBMS_WORKLOAD_REPOSITORY包需要擁有DBA權限。

--1.手動創建Snapshots 手動創建Snapshots通過DBMS_WORKLOAD_REPOSITORY.CREATE_SNAPSHOT過程

--例如

exec dbms_workload_repository.create_snapshot();

-- 然後可以通過 DBA_HIST_SNAPSHOT 視圖查看剛剛創建的Snapshots信息。

SELECT * FROM DBA_HIST_SNAPSHOT;

-- 2手動刪除Snapshots

--刪除Snapshots是使用DBMS_WORKLOAD_REPOSITORY包的另一個過程DROP_SNAPSHOT_RANGE 該過程在執行時可以通過指定snap_id的範圍的方式一次刪除多個Snapshot

--例如

select count(0) from dba_hist_snapshot where snap_id between 6770 and 6774;

select max(snap_id) from dba_hist_snapshot;

select dbid from v$database;

exec dbms_workload_repository.drop_snapshot_range(low_snap_id => 6770,high_snap_id => 6774,dbid => 4059638244);

--或者

begin

dbms_workload_repository.drop_snapshot_range(

low_snap_id => 6770,

high_snap_id => 6774,

dbid => 4059638244);

end;

select count(0) from dba_hist_snapshot where snap_id between 6770 and 6774;

監控——數據庫awr報告