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Google - just another big, dumb, brutal organisation?

Moans Nogood - Mon, 2007-12-31 04:42
I found this article in The Economist interesting:


There's some truth there, I think. Google is buying stuff (like blogger), is making pirate copies (sorry: clones) of other companies' software and in general trying to be as dominant and brutal as Microsoft, IBM, Oracle and the others. Yawn.

What the Hell happened to "Don't do evil"? Why did Google sell out to the Chinese horror regime?

They're just after the money and the happiness of shareholdes. Boring stuff.


R12 Global Deployment functionality

RameshKumar Shanmugam - Sat, 2007-12-29 17:04
It is a common Operation process in any industry to move people around or transfer employee’s temporary basis for a particular project or Assignment. Or transfer them permanently to a different country.

Though this functionality was available in 11i for the HR professionals to do it manually if the cross business group is enabled they can update organization and location in the assignment form, or another method of doing this is to terminate and hire the employee in the new business group.

Now in R12 this functionality has been made as a standard functionality in the Manager Self Service Responsibility Under the function 'Transfer'

Manager Self Service > Transfer

Select the employee you wanted to transfer, follow the wizard which will take you through complete process like new salary change, new direct report, New Location Change, Time card approver, work Schedule etc., finally you will receive a Review summary page where you can review and submit for the approval

Note: if you are a Oracle Payroll Customer you need to take necessary actions when changing the work location for the payroll Taxation
Try this out!!!
Categories: APPS Blogs

Oracle 11g NF Database Replay

Virag Sharma - Thu, 2007-12-27 22:10

Oracle 11g New Feature Database Replay

“Simulating production load is not possible” , you might have heard these word.

In one project, where last 2 year management want to migrate from UNIX system to Linux system ( RAC ) , but they still testing because they are not sure where this Linux Boxes where bale to handle load or not. They have put lot of efforts and time in load testing and functional testing etc, but still not le gain confidence.

After using these feature of 11g , they will gain confidence and will able to migrate to Linux with full confidence and will know how there system will behave after migration/upgrade.

As per datasheet given on OTN

Database Replay workload capture of external clients is performed at the database server level. Therefore, Database Replay can be used to assess the impact of any system changes below the database tier level such as below:

  • Database upgrades, patches, parameter, schema changes, etc.
  • Configuration changes such as conversion from a single instance to RAC etc.
  • Storage, network, interconnect changes
  • Operating system, hardware migrations, patches, upgrades, parameter changes

DB replay does this by capturing a workload on the production system with negligible performance overhead( My observation is 2-5% more CPU usage ) and replaying it on a test system with the exact timing, concurrency, and transaction characteristics of the original workload. This makes possible complete assessment of the impact of the change including undesired results; new contentions points or performance regressions. Extensive analysis and reporting ( AWR , ADDM report and DB replay report) is provided to help identify any potential problems, such as new errors encountered and performance divergences. The ability to accurately capture the production workload results in significant cost and timesaving since it completely eliminates the need to develop simulation workloads or scripts. As a result, realistic testing of even complex applications using load simulation tools/scripts that previously took several months now can be accomplished at most in a few days with Database Replay and with minimal effort. Thus using Database Replay, businesses can incur much lower costs and yet have a high degree of confidence in the overall success of the system change and significantly reduce production deployment

Steps for Database Replay

  1. Workload Capture

Database are tracked and stored in binary files, called capture files, on the file system. These files contain all relevant information about the call needed for replay such as SQL text, bind values, wall clock time, SCN, etc.

1) Backup production Database #

2) Add/remove filter ( if any you want )
By default, all user sessions are recorded during workload capture. You can use workload filters to specify which user sessions to include in or exclude from the workload. Inclusion filters enable you to specify user sessions that will be captured in the workload. This is useful if you want to capture only a subset of the database workload.
For example , we don't want to capture load for SCOTT user

fname => 'user_scott',
fattribute => 'USER',
fvalue => 'SCOTT');

Here filter name is "user_scott" ( user define name)

3) Create directory make sure enough space is there

AS '/u04/oraout/test/db-replay-capture';

Remember in case on Oracle RAC directory must be on shared disk otherwise , you will get following error

SQL> l
2 DBMS_WORKLOAD_CAPTURE.start_capture (name =>'capture_testing',dir => 'DB
3 END;

SQL> /
ERROR at line 1:
ORA-15505: cannot start workload capture because instance 2 encountered errors
while accessing directory "/u04/oraout/test/db-replay-capture"
ORA-06512: at "SYS.DBMS_WORKLOAD_CAPTURE", line 799
ORA-06512: at line 2

4) Capture workload

name => capture_testing',dir=>'DB_REPLAY_DIR',
duration => NULL );

Duration => NULL mean , it will capture load till we stop with below mentioned manual SQL command. Duration is optional input to specify the duration (in seconds) , default is NULL

5) Finish capture


# Take backup of production before Load capture, so we can restore database on test environment and will run replay on same SCN level of database to minimize data divergence

Note as per Oracle datasheet

The workload that has been captured on Oracle Database release and higher can also be replayed on Oracle Database 11g release.So , I think , It simply mean NEW patch set will support capture processes. Is it mean Current patch set ( not support load capture ??????

2. Workload Processing

Once the workload has been captured, the information in the capture files has to be processed preferably on the test system because it is very resource intensive job. This processing transforms the captured data and creates all necessary metadata needed for replaying the workload.

exec DBMS_WORKLOAD_REPLAY.process_capture('DB_REPLAY_DIR');

  1. Workload Replay

1) Restore database backup taken step one to test system and start Database

2) Initialize

DBMS_WORKLOAD_REPLAY.initialize_replay (
replay_name => 'TEST_REPLAY',
replay_dir => 'DB_REPLAY_DIR');

3) Prepare

exec DBMS_WORKLOAD_REPLAY.prepare_replay(synchronization => TRUE)

4) Start clients

$ wrc mode=calibrate replaydir=/u03/oradata/test/db-replay-capture

Workload Replay Client: Release - Production on Wed Dec 26 00:31:41 2007

Copyright (c) 1982, 2007, Oracle. All rights reserved.

Report for Workload in: /u03/oradata/test/db-replay-capture

Consider using at least 1 clients divided among 1 CPU(s).

Workload Characteristics:
- max concurrency: 1 sessions
- total number of sessions: 7

- 1 client process per 50 concurrent sessions
- 4 client process per CPU
- think time scale = 100
- connect time scale = 100
- synchronization = TRUE

$ wrc system/pass mode=replay replaydir=/u03/oradata/test/db-replay-capture

Workload Replay Client: Release - Production on Wed Dec 26 00:31:52 2007
Copyright (c) 1982, 2007, Oracle. All rights reserved.

Wait for the replay to start (00:31:52)

5) Start Replay


$ wrc system/pass mode=replay replaydir=/u03/oradata/test/db-replay-capture

Workload Replay Client: Release - Production on Wed Dec 26 00:31:52 2007
Copyright (c) 1982, 2007, Oracle. All rights reserved.

Wait for the replay to start (00:31:52)
Replay started (00:33:32)
Replay finished (00:42:52)

  1. Analysis and Reporting

Generate AWR , ADDM and DB reply report and compare with data gathered on production for same timeperiod when load was captured on Production database. For Database Replay Report run following command

SQL> SELECT id, name FROM dba_workload_replays;

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

v_report CLOB;
v_report := DBMS_WORKLOAD_replay.report(
replay_id => 1,

For sample report [ Click Here]

Chapter 22 Database Replay
Categories: DBA Blogs

Mobile phones, fats and backups

Moans Nogood - Thu, 2007-12-27 04:56
As with such things, life has been rather dull since the fire - relatively speaking. Fortunately, I had a wonderful thing happening to my mobile phone that brightened several of my days before Christmas.

It all started about half a year ago, when the menu button on my Nokia E60 stopped working. That's rather inconvenient, but I could still call people up and receive calls, so no big problem.

Then, one Saturday in December, the old team from the National Nurses' Dormitory in Copenhagen had our annual, traditional, Danish Christmas lunch in a place called Told & Snaps in Copenhagen. When the frist dish was brought in - pickled herrings, of course - my dear friend Ole and I decided to see if soft butter on the keys could bring the menu button back to life. So we, uhm, buttered the keyboard - and it worked! The menu button worked again!

Flushed with succes we decided to try and repair the problems I had with the microphone and loudspeaker in the E60. So we used fat (from a duck, I think) on the, eh, bottom of the phone. Didn't seem to have the desired effect. In fact, in the days that followed I had to shout louder and louder in order for people to hear me. It was getting silly - I had to be in the privacy of my car in order not to disturb the general population with my shouting.

But I could still send and receive SMS messages, so things were OK.

Then my wife Anette and I had dinner at restaurant Avanti and that's when Anette hit the oil lamp on the table so that the E60 became soaked in oil. The display looked like a lava lamp and the keys became very loooong and soooft to use.

During the night, while I was asleep, the E60 sadly expired.

That's when I discovered that my 800 contacts were residing inside the E60, not on the mini-SD-card. So I got a new phone from a friendly phone broker (an N-73, which seems to be a fine phone, by the way) but every call I received were wonderfully new and exciting since I didn't recognice any of the numbers.

Of course I didn't have any backup. I'm a man.

Then a miracle happened. Anette and some good Miracle folks managed to wake up the phone for a short while and unload my contacts. That was a good day.

So people have told me: This will teach you to remember to take a backup!

But look at it this way: I started carrying a mobile phone 25/8/370 back in 1991 and this was the first time I was in danger of losing everything. And I have never taken a backup.

Chances are it won't happen again anytime soon either, unless somebody steals it.

So I think I'll continue with my usual mobile phone backup strategy :-))).

Merry Christmas.


Oracle 11g Database Replay

Virag Sharma - Thu, 2007-12-27 01:32

If your database currently running on 10g R2 , and want upgrade database to 11g then you can take advantage of Database Replay , As per Datasheet given on OTN workload capture on can run/replay on 11g.

So , it simply mean , before you going to upgrade from 10g R2 to 11g , you can take advantage of database Replay feature i.e. capture work load on Production 10g R2 database , then copy workload to test system , upgrade test system to 11g , run workload captured on production and check how your system performing. This make life easier , isn't it ?

Check following links

Categories: DBA Blogs

Add / Delete a row from a SQL based Tabular Form (Static ID)

Duncan Mein - Tue, 2007-12-25 15:40
The current application I am working on involves a re-write to a 12 screen wizard that was written 18 months ago. Several of the screens make use of manually built tabular forms (SQL report regions) and collections to hold the values entered. Some of the screens in the wizard have multiple tabular forms on them as well.

Currently all tabular forms have 15 lines which cannot be added to or deleted from. In the new version, we removed this limit and allow the user to add as many rows as he / she needs. Furthermore, specific rows can now be removed from the Tabular form. Since all entered data is written into collections, we wanted to avoid "line by line" processing i.e. submitting the form for each time, updating the collection and branching back to the page. By utilising some simple JavaScript and the new "Static ID" of the Reports Region new to APEX 3.0, all requirements could be met.

The Static ID attribute of the reports region allow us to add our own (unique) ID to a report region. From here we can simpley navigate down the DoM, clone a row in the form using cloneNode and append it to the table using appendChild.

The JavaScript will work even if you have multiple report regions on the same page providing each report region has a unique Static ID value.

  • Create a new region on your page using the following details:
  1. Region Type: Report
  2. Report Implementation: SQL Report
  3. Title: Add Row to Report
  4. Region Template: Reports Region
  5. SQL Query: view
  6. Report Template: Standard
  • Add the following JavaScript to your Page Header: view
  • Copy the region template: Reports Region and name it Reports Region (Static ID)
  • Edit the region template: Reports Region (Static ID) and replace the Substitution String #REGION_ID# with #REGION_STATIC_ID# in the Definition section

  • Edit the region: Add Rows to Report and insert the value: REPORT1 into the Static ID textbox found in the Identification seciton. Note that the values entered into the Static ID textbox must be unique to the page if using multiple report regions where you are specifying a Static ID. Then change the template of the region to use the newley created Reports Region (Static ID) template

  • Copy the report template: Standard and name it Standard (Static ID)

  • Edit the report template: Standard (Static ID) and replace the text: id="#REGION_ID#" with: id="datatable_#REGION_ID#" in the before rows section.

  • Edit the report attributes and change the report template to use the newley created: Standard (Static ID)

  • Add a button to the page using the following details:
  1. Select a Region for the Button: Add Rows to Report
  2. Position: Create a button in a region position
  3. Button Name: ADD_ROW
  4. Label: Add Row
  5. Button Type: HTML Button
  6. Action: Redirect to URL without submitting page
  7. Target is a: URL
  8. URL Target: javascript:addRow('REPORT1');

Please note that REPORT1 refers to the Static ID of the region you want to add your row to

  • Test your Add and Delete a row functionality

An example with all the source code can be seen here

Creating a physical standby Database in Oracle10g

Ayyappa Yelburgi - Mon, 2007-12-24 05:13
STEPS for creating 10g dataguardprerequisite : 9i dataguard setup knowledgestep1 :Prepare initSID.ora file for primary and standby databases as follow.** STANDBY setup parameters are given in BOLDpart A)**** Production database primary file ****prod.__db_cache_size=125829120prod.__java_pool_size=4194304prod.__large_pool_size=4194304prod.__shared_pool_size=79691776prod.__streams_pool_size=0*.ayyudbahttp://www.blogger.com/profile/00046200352601718598noreply@blogger.com125

Migrating Dictionar managed tablespace to locally managed tablespace

Ayyappa Yelburgi - Mon, 2007-12-24 05:08
SQL> EXEC DBMS_SPACE_ADMIN.TABLESPACE_MIGRATE_TO_LOCAL('TEMPD')BEGIN DBMS_SPACE_ADMIN.TABLESPACE_MIGRATE_TO_LOCAL('TEMPD'); END;*ERROR at line 1:ORA-03245: Tablespace has to be dictionary managed, online and permanent to be able to migrateORA-06512: at "SYS.DBMS_SPACE_ADMIN", line 0ORA-06512: at line 1SQL> EXEC DBMS_SPACE_ADMIN.TABLESPACE_MIGRATE_TO_LOCAL('USERSD')PL/SQL procedure successfully ayyudbahttp://www.blogger.com/profile/00046200352601718598noreply@blogger.com116

Installation of oracle9i/10g on Linux & Solaris

Ayyappa Yelburgi - Mon, 2007-12-24 05:04
9/10g install on Linux/Solaris Install Oracle 9i Database on Linux RHEL AS 3the following lines can be added to the /etc/sysctl.conf file:kernel.shmmax = 2147483648kernel.shmmni = 128kernel.shmall = 2097152kernel.sem = 250 32000 100 128fs.file-max = 65536net.ipv4.ip_local_port_range = 1024 65000In addition the following lines can be added to the /etc/security/limits.conf file:oracle soft nofile ayyudbahttp://www.blogger.com/profile/00046200352601718598noreply@blogger.com76

Sql Scripts for knowing the transaction status

Ayyappa Yelburgi - Mon, 2007-12-24 05:00
select * from v$transaction;--All tranasactions + sid and usernameselect s.sid,s.username, t.start_time, t.used_ublk, t.used_urecfrom v$transaction t, v$session swhere t.ses_addr=s.saddr;--All tranasactions + sid and username + first 64 bytes of SQLselect s.sid,s.username, t.start_time, t.used_ublk, t.used_urec,sql.sql_textfrom v$transaction t, v$session s, v$sql sqlwhere t.ses_addr=s.saddrand ayyudbahttp://www.blogger.com/profile/00046200352601718598noreply@blogger.com17


Ayyappa Yelburgi - Mon, 2007-12-24 04:58
Give more knowledge to cost based optimizer about object statisticsand make it intelligent.. U remember Knowledge is Power - Aristotle-- Gather stats for a table. Auto sampling and auto number of histogram -- buckets, might not work in previous Oracle version.begindbms_stats.gather_table_stats('&OWNER','&TABLE_NAME',null,DBMS_STATS.AUTO_SAMPLE_SIZE -- put null or percentage for older oracle,falseayyudbahttp://www.blogger.com/profile/00046200352601718598noreply@blogger.com6


Ayyu's Blog - Mon, 2007-12-24 04:58
Categories: DBA Blogs

Query in DR....

Ayyappa Yelburgi - Mon, 2007-12-24 04:56
What is Right What is Wrong Found a DBA giving following commands at standby site to switchover while standby database was mounted.SQL> ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY;ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY*ERROR at line 1:ORA-16139: media recovery requiredSQL> recover managed standby database disconnect;Media recovery complete.SQL> ALTER DATABASE COMMIT TO SWITCHOVER TO ayyudbahttp://www.blogger.com/profile/00046200352601718598noreply@blogger.com6

Query in DR....

Ayyu's Blog - Mon, 2007-12-24 04:56
Categories: DBA Blogs

How to create Databas in 2 node RAC ..?

Ayyappa Yelburgi - Mon, 2007-12-24 04:55
Database creation in RAC environment( 2 instances). can not rely on dbca always CREATE PARAMETER FILE AND PLACE IT IN SHARED LOCATION (O:\TEST\INITTEST.ORA shared location here ) AS FOLLOWING SO THAT BOTH RAC INSTANCES CAN SHARE IT. point to this pfile/spfile from individual instance home/dbs. # START OF INITTEST.ORA *.aq_tm_processes=1*.test1.background_dump_dest='D:\Oracle\admin\test1\bdump'*.ayyudbahttp://www.blogger.com/profile/00046200352601718598noreply@blogger.com8

How to create Databas in 2 node RAC ..?

Ayyu's Blog - Mon, 2007-12-24 04:55
Categories: DBA Blogs


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