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AWR信息报告

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Jun 07, 2016 pm 02:54 PM

oracledatabase

AWR报告是我们研究分析Oracle性能，特别是应用程序工作特性的重要工具手段。进入10g之后，随着CBO的推广、自动作业机制的确立，越

AWR报告是我们研究分析Oracle性能，特别是应用程序工作特性的重要工具手段。进入10g之后，随着CBO的推广、自动作业机制的确立，越来越多的运维人员乃至开发人员将AWR作为分析性能的工具。

除了AWR报告本身，Oracle还提供了一些AWR相关的脚本，用于进行辅助操作。本篇主要介绍awr Info脚本。

1、环境介绍

本篇使用Oracle 11gR2进行实验，具体版本为11.2.0.4。

[oracle@SICS-MIGPC-DB ~]$ sqlplus /nolog

SQL*Plus: Release 11.2.0.4.0 Production on Sat Oct 10 08:52:31 2015

SQL> conn / as sysdba

Connected.

SQL> select * from v$version;

BANNER

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

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

PL/SQL Release 11.2.0.4.0 - Production

CORE 11.2.0.4.0 Production

TNS for Linux: Version 11.2.0.4.0 - Production

NLSRTL Version 11.2.0.4.0 – Production

2、脚本执行

执行的生成脚本是在Oracle客户端。为避免由于版本原因带来的差异问题，笔者建议最好是在Oracle服务器端生成文件。

[oracle@SICS-MIGPC-DB ~]$ sqlplus /nolog

SQL*Plus: Release 11.2.0.4.0 Production on Sat Oct 10 09:16:45 2015

SQL> conn / as sysdba

Connected.

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

之后要求输入报告名称。

This script will report general AWR information

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

Specify the Report File Name

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

The default report file name is awrinfo.txt. To use this name,

press to continue, otherwise enter an alternative.

Enter value for report_name:

最后会自动输出信息：

(若干输出)

(2b) ASH details (past 1 day)

**********************************

INST MIN_TIME MAX_TIME NUM_SAMPLES NUM_ROWS AVG_ACTIVE

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

1 10:10:12 (10/09) 08:49:19 (10/10) 8,145 1,604 0.20

**********************************

(2c) ASH sessions (Fg Vs Bg) (past 1 day across all instances in RAC)

**********************************

Foreground % 90.0

Background % 10.0

MMNL % 0.0

End of Report

Report written to awrinfo.txt

在当前目录下，会看到awrinfo.txt文件。下面会分部分进行解析：

3、结果解析

下面分为若干部分进行结果说明。

第一部分：报告信息说明。抽取出AWR配置信息和保留自动删除信息。

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

AWR INFO Report

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

Report generated at

09:18:28 on Oct 10, 2015 ( Saturday ) in Timezone +08:00

Warning: Non Default AWR Setting!

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

Snapshot interval is 60 minutes and Retention is 8 days

DB_ID DB_NAME HOST_PLATFORM INST STARTUP_TIME LAST_ASH_SID PAR

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

* 2746051042 SICSDB SICS-MIGPC-DB - Linux x86 64-bit 1 10:28:41 (01/08) 23726128 NO

第二部分：AWR镜像snapshot信息。依据规则，每次snapshot记录是保存在sysaux表空间里面的。经常会遇到SYSAUX不断增大超过限制的问题，一般都是由于AWR Purge引起的问题。

########################################################

(I) AWR Snapshots Information

########################################################

*****************************************************

(1a) SYSAUX usage - Schema breakdown (dba_segments)

*****************************************************

Statement

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