AWR全称Automatic Workload Repository，自动负载信息库，是Oracle 10g版本后推出的一种性能收集和分析工具，提供了一个时间段内整个系统的报表数据。通过AWR报告，可以分析指定的时间段内数据库系统的性能。

1. sqlplus登录Oracle

[[email protected] ~]# su - oracle
Last login: Thu Aug 11 13:30:16 CST 2022 on pts/0
[[email protected] ~]$ sqlplus /nolog

SQL*Plus: Release 11.2.0.4.0 Production on Sun Aug 14 13:59:26 2022

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

SQL> conn /as sysdba
Connected.
SQL>

2. 创建快照

　　执行语句创建快照：exec dbms_workload_repository.create_snapshot;

2.1 压测前创建快照

SQL> exec dbms_workload_repository.create_snapshot;

PL/SQL procedure successfully completed.

2.2 压测结束创建快照

SQL> exec dbms_workload_repository.create_snapshot;

PL/SQL procedure successfully completed.

3. 生成awr报告

3.1 执行命令： @?/rdbms/admin/awrrpt

3.2 选择awr报告类型，可选择html或text，默认为html（直接回车即可）。建议选择html

3.3 选择要生成的报告的日期是在多少天以前记录，输入1，则表示要生成今天0点开始到现在之内的某个时间段的报告；输入2，则表示要生成昨天0点开始到现在之内的某个时间段的报告；以此类推。默认情况下，AWR会将镜像信息保留一个月，缺省记录最近7天。

3.4 输入天数后，界面会输出一个时间段的表格，每个时间点都对应一个snap Id，间隔时间默认是1个小时。接下来，输入要生成报告的时间开始点对应的snap Id， 然后再输入结束点对应的snap Id

3.5 接着要求输入生成报告的名字，例如：awr.html。系统会自动生成一个报告名字并会在提示信息中显示出来，如果使用默认名称，则不用输入任何内容，直接回车即可。

SQL> @?/rdbms/admin/awrrpt

Current Instance
~~~~~~~~~~~~~~~~

   DB Id    DB Name      Inst Num Instance
----------- ------------ -------- ------------
 2154841071 UFGOVDB1            1 ufgovdb1


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:

Type Specified:  html


Instances in this Workload Repository schema
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

   DB Id     Inst Num DB Name      Instance     Host
------------ -------- ------------ ------------ ------------
* 2154841071        1 UFGOVDB1     ufgovdb1     ufdb165

Using 2154841071 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: 1

Listing the last day's Completed Snapshots

                                                        Snap
Instance     DB Name        Snap Id    Snap Started    Level
------------ ------------ --------- ------------------ -----
ufgovdb1     UFGOVDB1           659 15 Aug 2022 00:00      1
                                660 15 Aug 2022 00:36      1
                                661 15 Aug 2022 00:36      1



Specify the Begin and End Snapshot Ids
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Enter value for begin_snap: 660
Begin Snapshot Id specified: 660

Enter value for end_snap: 661
End   Snapshot Id specified: 661



Specify the Report Name
~~~~~~~~~~~~~~~~~~~~~~~
The default report file name is awrrpt_1_660_661.html.  To use this name,
press <return> to continue, otherwise enter an alternative.

Enter value for report_name: awr.html

Using the report name awr.html

4. awr报告存放位置

 　　awr报告默认存放位置为：/home/oracle/

[[email protected] ~]$ cd /home/oracle/
[[email protected] ~]$ ls
20220811-10-12.lst  20220811-1.lst  20220811awr.lst  awr.html  etc