ASH使用
SQL> @?/rdbms/admin/ashrpt.sql

Current Instance
~~~~~~~~~~~~~~~~
   DB Id    DB Name  Inst Num Instance
----------- ------------ -------- ------------
  450641661 SUBSDB  1 subsdb

Specify the Report Type
~~~~~~~~~~~~~~~~~~~~~~~
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
------------ -------- ------------ ------------ ------------
* 450641661     1 SUBSDB    subsdb subsdb2
* 450641661     1 SUBSDB    subsdb subsdb1

Defaults to current database
Using database id: 450641661
Defaults to current instance
Using instance number: 1

ASH Samples in this Workload Repository schema
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Oldest ASH sample available:  27-Sep-11 09:40:25   [   7470 mins in the past]
Latest ASH sample available:  02-Oct-11 14:10:33   [   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: 10/02/11 08:30:00
Report begin time specified: 10/02/11 08:30:00
Enter duration in minutes starting from begin time:
Defaults to SYSDATE - begin_time
Press Enter to analyze till current time
Enter value for duration: 30
Report duration specified:   30
说明：打的ash报告时间段是从2011-10-02 8:30至2011-10-02 9:00。

Using 02-Oct-11 08:30:00 as report begin time
Using 02-Oct-11 09:00:00 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$SQL.SQL_ID) report target:
Defaults to NULL: (% and _ wildcards allowed)
SQL report target specified:
Specify WAIT_CLASS name (eg: from V$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 PLSQL_ENTRY name (eg: "SYS.DBMS_LOB.*") report target:
Defaults to NULL: (% and _ wildcards allowed)
PLSQL_ENTRY report target specified:

Specify the Report Name
~~~~~~~~~~~~~~~~~~~~~~~
The default report file name is ashrpt_1_1002_0900.html.  To use this name,
press to continue, otherwise enter an alternative.
Enter value for report_name: /home/oracle/ash_rpt_20111002_8:30-9:00.html

Using the report name /home/oracle/ash_rpt_20111002_8:30-9:00.html

Summary of All User Input
-------------------------
Format        : HTML
DB Id        : 450641661
Inst num       : 1
Begin time     : 02-Oct-11 08:30:00
End time       : 02-Oct-11 09:00:00
Slot width     : Default
Report targets : 0
Report name    : /home/oracle/ash_rpt_20111002_8:30-9:00.html