ASH（Active Session History）——根據SID生產報告（3）！

ASH可以在Session級別生產報告，使用sql_trace也有同樣的功能，但是sql_trace使用必須是Session還處於Active狀態，而ash則沒有這個限制。

    [oracle@linux ash]$ sqlplus / as sysdba @?/rdbms/admin/ashrpti.sql

    SQL*Plus: Release 10.2.0.4.0 - Production on 星期五 11月 25 08:05:12 2011

    Copyright (c) 1982, 2007, Oracle. All Rights Reserved.


    連線到:
    Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
    With the Partitioning, OLAP, Data Mining and Real Application Testing options


    Specify the Report Type
    ~~~~~~~~~~~~~~~~~~~~~~~
    Enter 'html' for an HTML report, or 'text' for plain text
    Defaults to 'html'
    輸入 report_type 的值: --這裡使用預設值。

    Type Specified: html


    Instances in this Workload Repository schema
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

       DB Id     Inst Num DB Name      Instance     Host
    ------------ -------- ------------ ------------ ------------
    * 1293815896        1 ORCL         orcl         linux

    Defaults to current database
    輸入 dbid 的值: --這裡使用預設值。

    Using database id: 1293815896

    Defaults to current instance
    輸入 inst_num 的值: --這裡使用預設值。（這裡提示輸入dbid和instance id，從這裡就可以指定其它的資料庫。）

    Using instance number: 1


    ASH Samples in this Workload Repository schema
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    Oldest ASH sample available: 17-11月-11 21:21:25 [ 10725 mins in the past]
    Latest ASH sample available: 25-11月-11 08:05:46 [      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
    輸入 begin_time 的值: -60 --這裡輸入60分鐘。
    Report begin time specified: -60

    Enter duration in minutes starting from begin time:
    Defaults to SYSDATE - begin_time
    Press Enter to analyze till current time
    輸入 duration 的值: --這裡使用預設值。
    Report duration specified:

    Using 25-11月-11 07:07:07 as report begin time
    Using 25-11月-11 08:07:20 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:
    輸入 slot_width 的值: 300 --在這裡指定300秒（5分鐘）做一次效能資料彙總。
    Slot Width specified: 300


    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:
    輸入 target_session_id 的值: 166 --在這裡指定一個sid來生產報告。
    SESSION report target specified: 166


    Specify SQL_ID (eg: from V$SQL.SQL_ID) report target:
    Defaults to NULL: (% and _ wildcards allowed)
    輸入 target_sql_id 的值: --這裡還可以指定sql_id。
    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)
    輸入 target_wait_class 的值: --這裡可以對某一類等待事件生產報告。
    WAIT_CLASS report target specified:


    Specify SERVICE_HASH (eg: from V$ACTIVE_SERVICES.NAME_HASH) report target:
    Defaults to NULL:
    輸入 target_service_hash 的值: --這裡可以指定某一個services
    SERVICE report target specified:


    Specify MODULE name (eg: from V$SESSION.MODULE) report target:
    Defaults to NULL: (% and _ wildcards allowed)
    輸入 target_module_name 的值: --這裡可以指定某個模組，通常指某個程式。
    MODULE report target specified:


    Specify ACTION name (eg: from V$SESSION.ACTION) report target:
    Defaults to NULL: (% and _ wildcards allowed)
    輸入 target_action_name 的值: --這裡可以對具體的某個會話的動作生產報告。
    ACTION report target specified:


    Specify CLIENT_ID (eg: from V$SESSION.CLIENT_IDENTIFIER) report target:
    Defaults to NULL: (% and _ wildcards allowed)
    輸入 target_client_id 的值: --這裡可以對具體的某個客戶端生產報告。
    CLIENT_ID report target specified:


    Specify PLSQL_ENTRY name (eg: "SYS.DBMS_LOB.*") report target:
    Defaults to NULL: (% and _ wildcards allowed)
    輸入 target_plsql_entry 的值: --預設值。
    PLSQL_ENTRY report target specified:

    Specify the Report Name
    ~~~~~~~~~~~~~~~~~~~~~~~
    The default report file name is ashrpt_1_1125_0807.html. To use this name,
    press <return> to continue, otherwise enter an alternative.
    輸入 report_name 的值: --預設值。

    Using the report name ashrpt_1_1125_0807.html

    Summary of All User Input
    -------------------------
    Format         : HTML
    DB Id          : 1293815896
    Inst num       : 1
    Begin time     : 25-11月-11 07:07:07
    End time       : 25-11月-11 08:07:20
    Slot width     : 300 seconds
    Report targets : 1
    Report name    : ashrpt_1_1125_0807.html


   省略...............................................................................................................................
   .........................................
    Report written to ashrpt_1_1125_0807.html

ASH（Active Session History）——根據SID生產報告（3）！

ASH（Active Session History）——根據SID生產報告（3）！

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