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birt ean 128,
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birt ean 128,
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birt gs1 128,
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birt ean 128,
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birt ean 128,
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birt ean 128,
birt gs1 128,
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birt gs1 128,

birt ean 128,
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birt ean 128,
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birt gs1 128,
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birt gs1 128,
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In an ADDM report, each finding is followed by one or more recommendations. Thus, you might see a Recommendation 1, Recommendation 2, and so on, under each of the findings. For any particular finding, the sum of the benefit that follows the implementation of all recommendations under a finding equals that finding s impact (DB time). Note the following about the ADDM report shown in Listing 17-2: Findings 1 and 2 state that individual database segments responsible for significant physical I/O wait were found. ADDM recommends that you run the Segment Advisor to find out whether you can shrink the problem segments. Finding 3 reports an undersized buffer cache and recommends that you increase the SGA_TARGET parameter by 2,128MB. For Finding 4, the recommendation is to run the SQL Tuning Advisor on a specific SQL statement. For Finding 5, you re asked to look into disk striping and adopting the Automatic Storage Management solution, since the user I/O wait event was taking up considerable DB time.

The ADDM S I/O performance analysis is based on the assumption that the average read time for one database block is 10,000 microseconds.

MyEventTarget +Method1()

At the end of the detailed ADDM Report, you ll see a section called Additional Information, which usually shows insignificant wait information.

Tip Oracle enables the ADDM by default, as long as you set the STATISTICS_LEVEL parameter to TYPICAL or ALL. If you set the STATISTICS_LEVEL parameter to BASIC, you ll disable many automatic performance-tuning and statistics-gathering activities, including the AWR and ADDM.

You can create an ADDM report by using the addmrpt.sql script, found in the $ORACLE_HOME/rdbms/ admin directory. The example in Listing 17-3 shows how to get the ADDM report for the period between 6 a.m. and 2 p.m. To do so, I specified the snapshot numbers corresponding to the 6 a.m. and 2 p.m. snapshot collection times the addmrpt.sql script makes this easy by displaying a list of snapshot numbers and the corresponding dates and times. (In the script, you can see that snapshot ID 3068 was captured at 6:00 a.m. and 3076 was captured at 2:00 p.m.) Listing 17-3. Producing an ADDM Report with the addmrpt.sql Script $ sqlplus /nolog SQL*Plus: Release 11.1.0.6.0 - Production on Thu Apr 10 09:21:48 2008 Copyright (c) 1982, 2007, Oracle. All rights reserved.

Figure 5-5. A typed object call, using an interface The use of interfaces in typed object calls is often advantageous, compared to calling through a class, because interfaces can reduce the magnitude of intercomponent coupling. By packaging many interfaces together into a single component, event sources incur coupling only to the interface component, as shown in Figure 5-6. In a large system, all the commonly used interfaces might be packaged together, and that package would tend to be at the center of the system s coupling diagram.

SQL> CONNECT sys/syspasswd AS SYSDBA Connected. SQL> @/u03/app/oracle/rdbms/admin addmrpt.sql Current Instance ~~~~~~~~~~~~~~~~ DB Id DB Name Inst Num Instance

----------- ------------ -------- -----------877170026 FINANCE 1 finance Instances in this Workload Repository schema ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ DB Id Inst Num DB Name Instance Host ------------ -------- ------------ ------------ ---866170026 1 FINANCE finance prod5 Using 866170026 for database Id Using 1 for instance number Specify the number of days of snapshots to choose from ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Entering the number of days (n) will result in the most recent (n) days of snapshots being listed Pressing <return> without specifying a number lists all completed snapshots.

interface MyInterface1 +MyMethod()

Listing the last 3 days of Completed Snapshots Snap Instance DB Name Snap Id Snap Started Level ------------ ------------ --------- ------------------ ----finance FINANCE 3067 22 Jul 2008 05:00 1 3068 22 Jul 2008 06:00 1 3069 22 Jul 2008 07:01 1 3070 22 Jul 2008 08:00 1 3071 22 Jul 2008 09:00 1 3072 22 Jul 2008 10:00 1 3073 22 Jul 2008 11:00 1 3074 22 Jul 2008 12:01 1 3075 22 Jul 2008 13:00 1 3076 22 Jul 2008 14:00 1 Specify the Begin and End Snapshot Ids ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Enter value for begin_snap: 3068 Begin Snapshot Id specified: 3068 Enter value for end_snap: 3076 End Snapshot Id specified: 3076 Specify the Report Name ~~~~~~~~~~~~~~~~~~~~~~~ The default report file name is addmrpt_1_3068_3076txt To use this name, press <return> to continue, otherwise enter an alternative Enter value for report_name: Using the report name addmrpt_1_3068_3076.