2013年(350)
分类: Oracle
2013-04-27 10:00:06
在没有之前,如果希望对不同时间段时,的整体影响进行对比,只能依靠DBA手工查询相关视图,并通过时间条件来获取差异(还有些统计已经无法对比),而在AWR中,直接就提供了,对不同时间段时,数据库的性能统计做差异对比的功能。
执行脚本如下:
SQL>@$ORACLE_HOME/rdbms/admin/awrddrpt.sql
Current Instance
~~~~~~~~~~~~~~~~
DB Id DB Id DB Name Inst Num Inst Num Instance
----------- ----------- ------------ -------- -------- ------------
3812548755 3812548755 TEST08 1 1 test08
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生成的报表格式,没啥说的,就默认的html格式吧。
Type Specified: html
Instances in this Workload Repository schema
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
DB Id Inst Num DB Name Instance Host
------------ -------- ------------ ------------ ------------
* 3812548755 1 TEST08 test08 yans1
Database Id and Instance Number for the First Pair of Snapshots
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Using 3812548755 for Database Id for the first pair of snapshots
Using 1 for Instance Number for the first pair of snapshots注意,下面紧接着,是选择第一份报表的相关参数,包括快照的区间,以及开始和结束的快照ID:
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. Pressingwithout
specifying a number lists all completed snapshots.
Enter value for num_days:2
Listing the last 2 days of Completed Snapshots
Snap
Instance DB Name Snap Id Snap Started Level
------------ ------------ --------- ------------------ -----
test08 TEST08 7450 25 10 月 2009 00:00 1
7451 25 10 月 2009 01:00 1
7452 25 10 月 2009 02:00 1
7453 25 10 月 2009 03:00 1
7454 25 10 月 2009 04:00 1
7455 25 10 月 2009 05:00 1
7456 25 10 月 2009 06:00 1
7457 25 10 月 2009 07:00 1
7458 25 10 月 2009 08:00 1
7459 25 10 月 2009 09:00 1
7460 25 10 月 2009 10:00 1
7461 25 10 月 2009 11:00 1
7462 25 10 月 2009 12:00 1
7463 25 10 月 2009 13:00 1
7464 25 10 月 2009 14:00 1
7465 25 10 月 2009 15:00 1
7466 25 10 月 2009 16:00 1
7467 25 10 月 2009 17:00 1
7468 25 10 月 2009 18:00 1
7469 25 10 月 2009 19:00 1
7470 25 10 月 2009 20:00 1
7471 25 10 月 2009 21:00 1
7472 25 10 月 2009 22:00 1
7473 25 10 月 2009 23:00 1
7474 26 10 月 2009 00:00 1
7475 26 10 月 2009 01:00 1
7476 26 10 月 2009 02:00 1
7477 26 10 月 2009 03:00 1
7478 26 10 月 2009 04:00 1
7479 26 10 月 2009 05:00 1
7480 26 10 月 2009 06:00 1
7481 26 10 月 2009 07:00 1
7482 26 10 月 2009 08:00 1
7483 26 10 月 2009 09:00 1
7484 26 10 月 2009 10:00 1
7485 26 10 月 2009 11:00 1
7486 26 10 月 2009 12:00 1
7487 26 10 月 2009 13:00 1
7488 26 10 月 2009 14:00 1
7489 26 10 月 2009 15:00 1
Specify the First Pair of Begin and End Snapshot Ids
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Enter value for begin_snap:7459
First Begin Snapshot Id specified: 7459
Enter value for end_snap:7462
First End Snapshot Id specified: 7462然后,是选择要对比的报表相关参数,包括快照的区间,以及开始和结束的快照ID:
Instances in this Workload Repository schema
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
DB Id Inst Num DB Name Instance Host
------------ -------- ------------ ------------ ------------
* 3812548755 1 TEST08 test08 yans1
Database Id and Instance Number for the Second Pair of Snapshots
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Using 3812548755 for Database Id for the second pair of snapshots
Using 1 for Instance Number for the second pair of snapshots
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. Pressingwithout
specifying a number lists all completed snapshots.
Enter value for num_days2:2
Listing the last 2 days of Completed Snapshots
Snap
Instance DB Name Snap Id Snap Started Level
------------ ------------ --------- ------------------ -----
test08 TEST08 7450 25 10 月 2009 00:00 1
7451 25 10 月 2009 01:00 1
7452 25 10 月 2009 02:00 1
7453 25 10 月 2009 03:00 1
7454 25 10 月 2009 04:00 1
7455 25 10 月 2009 05:00 1
7456 25 10 月 2009 06:00 1
7457 25 10 月 2009 07:00 1
7458 25 10 月 2009 08:00 1
7459 25 10 月 2009 09:00 1
7460 25 10 月 2009 10:00 1
7461 25 10 月 2009 11:00 1
7462 25 10 月 2009 12:00 1
7463 25 10 月 2009 13:00 1
7464 25 10 月 2009 14:00 1
7465 25 10 月 2009 15:00 1
7466 25 10 月 2009 16:00 1
7467 25 10 月 2009 17:00 1
7468 25 10 月 2009 18:00 1
7469 25 10 月 2009 19:00 1
7470 25 10 月 2009 20:00 1
7471 25 10 月 2009 21:00 1
7472 25 10 月 2009 22:00 1
7473 25 10 月 2009 23:00 1
7474 26 10 月 2009 00:00 1
7475 26 10 月 2009 01:00 1
7476 26 10 月 2009 02:00 1
7477 26 10 月 2009 03:00 1
7478 26 10 月 2009 04:00 1
7479 26 10 月 2009 05:00 1
7480 26 10 月 2009 06:00 1
7481 26 10 月 2009 07:00 1
7482 26 10 月 2009 08:00 1
7483 26 10 月 2009 09:00 1
7484 26 10 月 2009 10:00 1
7485 26 10 月 2009 11:00 1
7486 26 10 月 2009 12:00 1
7487 26 10 月 2009 13:00 1
7488 26 10 月 2009 14:00 1
7489 26 10 月 2009 15:00 1
Specify the Second Pair of Begin and End Snapshot Ids
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Enter value for begin_snap2:7483
Second Begin Snapshot Id specified: 7483
Enter value for end_snap2:7486
Second End Snapshot Id specified: 7486最后,为要生成的报表命令:
Specify the Report Name
~~~~~~~~~~~~~~~~~~~~~~~
The default report file name is awrdiff_1_7459_1_7483.html To use this name,
pressto continue, otherwise enter an alternative.
Enter value for report_name:awr_diff_1_7459_1_7483.html
Using the report name awr_diff_1_7459_1_7483.html
...............
...............报表生成以后,在显示时将以并列的形式,直观的显示出两个不同时间段里,数据库各项参数的差异,摘要如图:
前例的对比是在单实例环境下进行的,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前例相同,这里不再演示,感兴趣的朋友不妨自行。
查看之前的文章:
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