如果希望对多实例的数据库做对比,那就要使用$ORACLE_HOME/rdbms/admin/awrddrpi.sql脚本了。该脚本的操作基本与单实例基本相同,

1,生成指定SQL语句的统计报表
  如果希望对多实例的数据库做对比,那就要使用$Oracle_HOME/rdbms/admin/awrddrpi.sql脚本了。该脚本的操作基本与单实例基本相同,这里不再演示,感兴趣的朋友可以自己测试下。

2 ,,生成指定SQL语句的统计报表
  这项统计专门用来分析某条指定的SQL语句,通过awrsqrpt.sql脚本,awr能够生成指定sql(曾经执行过的SQL)的执行计划,消耗的资源等等信息,有助于DBA进行SQL调优。
[oracle@even ~]$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on Sun Dec 23 11:39:53 2012

Copyright (c) 1982, 2005, Oracle. All rights reserved.


Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, Oracle Label Security, OLAP and Data Mining options

SQL> exec dbms_workload_repository.create_snapshot;

PL/SQL procedure successfully completed.

SQL> @$ORACLE_HOME/rdbms/admin/awrsqrpt.sql

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

DB Id DB Name Inst Num Instance
----------- ------------ -------- ------------
2100083002 TEST 1 test


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: html

Type Specified: html


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

DB Id Inst Num DB Name Instance Host
------------ -------- ------------ ------------ ------------
* 2100083002 1 TEST test even.oracle.
com

Using 2100083002 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 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
------------ ------------ --------- ------------------ -----
test TEST 34 23 Dec 2012 11:00 1
35 23 Dec 2012 11:30 1
36 23 Dec 2012 11:40 1

Specify the Begin and End Snapshot Ids
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Enter value for begin_snap: 34
Begin Snapshot Id specified: 34

Enter value for end_snap: 36
End Snapshot Id specified: 36


Specify the SQL Id
~~~~~~~~~~~~~~~~~~
  注意,这里要指定分析的SQL_ID,你可能想问,要分析的SQL ID从何而来呢?一般来说,SQL_ID可以通过V$SQL(及其它相关视图),要么是通过AWR/STATSPACK等工具。
Enter value for sql_id: 4vsh055snc3du
SQL ID specified: 4vsh055snc3du

Specify the Report Name
~~~~~~~~~~~~~~~~~~~~~~~
The default report file name is awrsqlrpt_1_34_36.html. To use this name,
press to continue, otherwise enter an alternative.

Enter value for report_name: /home/oracle/awr_20121231.html

Using the report name /home/oracle/awr_20121231.html


AWR SQL Report