常见性能报告收集方法(AWR,ASH）

在出现性能问题的时候，HS_DBA通常都需要你生成，出现性能问题时间段的AWR或者ASH报告，所以还是需要客户维护人员平常学会收集

AWR ASH报告收集也是比较简单的

一下为实例：

1 AWR 报告的收集

$ sqlplus / as sysdba（首先在操作上以ORACLE用户登录，并且以SYS登录数据库）

SQL*Plus: Release 10.2.0.1.0 - Production on Wed Dec 24 14:57:53 2008

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

Connected to:

Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production

With the Partitioning, Real Application Clusters, OLAP and Data Mining options

SQL> @$ORACLE_HOME/rdbms/admin/awrrpt.sql;（执行这个SQL就可以开始AWR报告收集）

Current Instance

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

DB Id DB Name Inst Num Instance

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

3704746844 HS08 1 HS081

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: (首先会提示你输入生成报告类型，默认为HTML，所以回车就OK）

Type Specified: html

Instances in this Workload Repository schema

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

DB Id Inst Num DB Name Instance Host

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

3704746844 2 HS08 HS082 hp102

* 3704746844 1 HS08 HS081 hp101

Using 3704746844 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
（输入快照查看的间隔，一般一天的就OK，实际根据HS DBA的要求来做，）

Listing the last day's Completed Snapshots

Snap

Instance DB Name Snap Id Snap Started Level

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

HS081 HS08 158 24 Dec 2008 00:00 1

159 24 Dec 2008 01:00 1

160 24 Dec 2008 02:00 1

161 24 Dec 2008 03:00 1

162 24 Dec 2008 04:00 1

163 24 Dec 2008 05:00 1

164 24 Dec 2008 06:00 1

165 24 Dec 2008 07:00 1

166 24 Dec 2008 08:00 1

167 24 Dec 2008 09:00 1

168 24 Dec 2008 10:00 1

169 24 Dec 2008 11:00 1

170 24 Dec 2008 11:34 1

171 24 Dec 2008 11:39 1

172 24 Dec 2008 13:00 1

173 24 Dec 2008 14:00 1

Specify the Begin and End Snapshot Ids

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

Enter value for begin_snap: 167 （首先输入开始的快照ID，此处为167）

Begin Snapshot Id specified: 167

Enter value for end_snap: 169

End Snapshot Id specified: 169 （输入快照结束ID，可以根据要求的时间确定，此处为169）

Specify the Report Name

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

The default report file name is awrrpt_1_167_169.html. To use this name,

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

Enter value for report_name:
（输入报告的名字，默认的就可以，例如：awrrpt_1_167_169.html. 实例1 快照167-169的AWR报告

所以此处回车就OK，报告生成在当前目录下）

因为恒生的系统一般都是RAC，所以需要在各个节点下的AWR报告，如果你愿意登录各个节点，可以使用一下SQL

@?/rdbms/admin/awrrpti.sql ，和上边的区别就在这于，输入报告类型后的部分

Instances in this Workload Repository schema

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

DB Id Inst Num DB Name Instance Host

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

3704746844 2 HS08 HS082 hp102

* 3704746844 1 HS08 HS081 hp101

Enter value for dbid: 3704746844 （会要求你输入数据库的DBID）

Using 3704746844 for database Id

Enter value for inst_num: 1 （输入数据库实例NUM，一般就是2节点，所以一般就是输入1 或者2）剩下的部分没啥区别

Using 1 for instance number

2 ASH报告的生成

$ sqlplus / as sysdba （首先SYS用户登录数据库）

SQL*Plus: Release 10.2.0.1.0 - Production on Wed Dec 24 15:14:21 2008

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

Connected to:

Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production

With the Partitioning, Real Application Clusters, OLAP and Data Mining options

SQL> @$ORACLE_HOME/rdbms/admin/ashrpt.sql; （执行这个脚本开始ASH报告生成）

Current Instance

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

DB Id DB Name Inst Num Instance

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

3704746844 HS08 2 HS082

Specify the Report Type

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

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

Defaults to 'html'

Enter value for report_type: （默认HTML,回车即可）

Type Specified: html

Instances in this Workload Repository schema

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

DB Id Inst Num DB Name Instance Host

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

3704746844 1 HS08 HS081 hp101

* 3704746844 2 HS08 HS082 hp102

Defaults to current database

Using database id: 3704746844

Defaults to current instance

Using instance number: 2

ASH Samples in this Workload Repository schema

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

Oldest ASH sample available: 17-Dec-08 11:06:09 [ 10329 mins in the past]

Latest ASH sample available: 24-Dec-08 15:14:23 [ 0 mins in the past]

Specify the timeframe. to generate the ASH report

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

Enter begin time for report:

-- Valid input formats:

-- To specify absolute begin time:

-- [MM/DD[/YY]] HH24:MI[:SS]

-- Examples: 02/23/03 14:30:15

-- 02/23 14:30:15

-- 14:30:15

-- 14:30

-- To specify relative begin time: (start with '-' sign)

-- -[HH24:]MI

-- Examples: -1:15 (SYSDATE - 1 Hr 15 Mins)

-- -25 (SYSDATE - 25 Mins)

Defaults to -15 mins

Enter value for begin_time: 08/12/24 15:10
（输入开始的时间，格式为： 年/月/日 小时/分钟/秒)

Report begin time specified: 08/12/24 15:10

Enter duration in minutes starting from begin time:

Defaults to SYSDATE - begin_time

Press Enter to analyze till current time

Enter value for duration: 08/12/24 15:12 (输入结束的时间 ，格式同上，根据问题发生的时间段生成就好了）

Report duration specified: 08/12/24 15:12

declare

*

ERROR at line 1:

ORA-06502: PL/SQL: numeric or value error: character to number conversion error

ORA-06512: at line 12

Using 12-Aug-24 15:10:00 as report begin time

Using as report end time

Specify Slot Width (using ashrpti.sql) for 'Activity Over Time' section

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

-- Explanation:

-- In the 'Activity Over Time' section of the ASH report,

-- the analysis period is divided into smaller slots

-- and top wait events are reported in each of those slots.

-- Default:

-- The analysis period will be automatically split upto 10 slots

-- complying to a minimum slot width of

-- 1 minute, if the source is V$ACTIVE_SESSION_HISTORY or

-- 5 minutes, if the source is DBA_HIST_ACTIVE_SESS_HISTORY.

Specify Slot Width in seconds to use in the 'Activity Over Time' section:

Defaults to a value as explained above:

Slot Width specified:

Specify Report Targets (using ashrpti.sql) to generate the ASH report

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

-- Explanation:

-- ASH Report can accept "Report Targets",

-- like a particular SQL statement, or a particular SESSION,

-- to generate the report on. If one or more report targets are

-- specified, then the data used to generate the report will only be

-- the ASH samples that pertain to ALL the specified report targets.

-- Default:

-- If none of the report targets are specified,

-- then the target defaults to all activity in the database instance.

Specify SESSION_ID (eg: from V$SESSION.SID) report target:

Defaults to NULL:

SESSION report target specified:

Specify SQL_ID (eg: from V$SQL.SQL_ID) report target:

Defaults to NULL: (% and _ wildcards allowed)

SQL report target specified:

Specify WATI_CLASS name (eg: from V$EVENT_NAME.WAIT_CLASS) report target:

[Enter 'CPU' to investigate CPU usage]

Defaults to NULL: (% and _ wildcards allowed)

WAIT_CLASS report target specified:

Specify SERVICE_HASH (eg: from V$ACTIVE_SERVICES.NAME_HASH) report target:

Defaults to NULL:

SERVICE report target specified:

Specify MODULE name (eg: from V$SESSION.MODULE) report target:

Defaults to NULL: (% and _ wildcards allowed)

MODULE report target specified:

Specify ACTION name (eg: from V$SESSION.ACTION) report target:

Defaults to NULL: (% and _ wildcards allowed)

ACTION report target specified:

Specify CLIENT_ID (eg: from V$SESSION.CLIENT_IDENTIFIER) report target:

Defaults to NULL: (% and _ wildcards allowed)

CLIENT_ID report target specified:

Specify the Report Name

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

The default report file name is ashrpt_2_.html. To use this name,

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

Enter value for report_name:
（报告的名字，回车就好了）

因为恒生的系统一般都是RAC，所以需要在各个节点下的AWR报告，如果你愿意登录各个节点，可以使用一下SQL

@?/rdbms/admin/ashrpti.sql 与上边的不同也就是需要输入DBID和实例NUMBER，明白提示的意思就好了）

另外需要注意 AWR ASH报告两个快照间，或者时间之间，不能有数据库重启的操作，如果有会有报错）