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[经验分享] 通过案例学习调优之--Oracle ASH

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发表于 2018-9-11 10:14:08 | 显示全部楼层 |阅读模式
Current Instance  
~~~~~~~~~~~~~~~~
  
   DB Id    DB Name      Inst Num Instance
  
----------- ------------ -------- ------------
  
  199802235 PROD                1 prod
  
Elapsed: 00:00:00.07
  
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
  
------------ -------- ------------ ------------ ------------
  
* 199802235         1 PROD         prod         rh55
  
Defaults to current database
  
Using database id: 199802235
  
Defaults to current instance
  
Using instance number: 1
  
ASH Samples in this Workload Repository schema
  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  
Oldest ASH sample available:  15-Aug-14 11:55:37   [   4625 mins in the past]
  
Latest ASH sample available:  18-Aug-14 17:00:17   [      1 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
  
Enter duration in minutes starting from begin time:
  
Defaults to SYSDATE - begin_time
  
Press Enter to analyze till current time
  
Enter value for duration:
  
Report duration specified:
  
Using 18-Aug-14 16:51:39 as report begin time
  
Using 18-Aug-14 17:01:40 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_1_0818_1704.html.  To use this name,
  
press  to continue, otherwise enter an alternative.
  
Enter value for report_name: ash3.html



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