1、收集ash报告

[oracle@1 ~]$ sqlplus / as sysdba

SQL*Plus: Release 12.1.0.2.0 Production on Fri Sep 21 18:43:01 2018

Connected to:

Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production

With the Partitioning, Automatic Storage Management, OLAP, Advanced Analytics

and Real Application Testing options

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

...

Enter duration in minutes starting from begin time:

Defaults to SYSDATE - begin_time

Press Enter to analyze till current time

Enter value for duration: 回车默认html格式

...

Defaults to -15 mins

Enter value for begin_time: 开始时间，回车默认十五分钟前，自定义格式:09/17/18 00:00:00

...

Press Enter to analyze till current time

Enter value for duration: 结束时间，回车默认但前时间，自定义格式:200 单位：分钟

...

The default report file name is ashrpt_1_0921_1853.html. To use this name,

press to continue, otherwise enter an alternative.

Enter value for report_name: 存放路径，回车默认为：/home/oracle/ashrpt_1_0921_1853.html

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

Current Instance

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

DB Id DB Name Inst Num Instance

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

3435663478 NCDB 1 ncdb1

Specify the Report Type

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

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

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

* 3435663478 1 NCDB ncdb1 ncdb01

3435663478 2 NCDB ncdb2 ncdb02

Defaults to current database

Using database id: 3435663478

Enter instance numbers. Enter 'ALL' for all instances in a

RAC cluster or explicitly specify list of instances (e.g., 1,2,3).

Defaults to current instance.

Using instance number(s): 1

ASH Samples in this Workload Repository schema

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

Oldest ASH sample available: 15-Jul-19 23:59:53 [ 12425 mins in the past]

Latest ASH sample available: 24-Jul-19 15:04:57 [ 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: 07/23/19 10:00:00

Report begin time specified: 07/23/19 10:00:00

Enter duration in minutes starting from begin time:

Defaults to SYSDATE - begin_time

Press Enter to analyze till current time

Enter value for duration: 150

Report duration specified: 150

Using 23-Jul-19 10:00:00 as report begin time

Using 23-Jul-19 12:30:00 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: