Need Advise and Suggestions-Oracle 10g

Hi,
I have been working on databases as DB developer(mainly PLsql)--Oracle 10g
Recently,i have joined in a particular position where I have been asked to find out areas where
improvement is necessary / or areas where improvement or changes would help very much and also gradually implement all best practises avaialable.
So,could you please help me with these queries
(1)What are the most important areas that i can start with the database which would impact largely the entire database.How can i start with it? any steps or process
(2)I had once taken a report out for the expensive SQLs running.But that dint help much...because those SQLs were used temporarily on and off.
Similarly,what are the other points to be looked on.
(3)Things which can be replaced with the industry standarad better ones fully.
an example would be...like.."following a particular naming format,or coding style,etc
Thanks
Rohit

Hi Rohit,
This is a pretty huge subject. To start, I'd say you need to talk to the business. Talk to the users of the database, cause they are your customers. Get a clear understanding of the most critical business processes. Start with the most critical ones, and get performance profiles. How long do they take to run? What's the customer's perception of the process performance? If it's acceptable, move on to the next one. If it's not acceptable, you'll need to dig deeper. Look at each piece of the process. Where is the most time being spent? Can it be improved? This step will be a combination of process improvement and setting the correct expectation. Often, the user doesn't really know what is realistic in terms of performance. If you have a 2 billion row table that needs to get full table scanned, expecting a response time of a few seconds just simply isn't going to happen. You need to clearly convey that to the customer. On the other hand, at the same time, you should be on the lookout for real improvements. If you can re-write the SQL or add an index, and eliminate the FTS on that 2 billion row table, maybe a response time of a few seconds is actually realistic.
It's all about understanding the system, and understanding the customer's needs, and how they intersect. It will be an iterative process, and will take some time.
As to "best practices", I'm not a fan of them. Understand your system, understand your customer's needs, and understand how Oracle actually works. If you can master that, you'll be unstoppable. Note that many, many people, much smarter people than me, have spent a lifetime trying to master those three points... :-)
Good luck with your new job!
-Mark

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Restore and recover Oracle 10g database from tape.

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853153 wrote:
I have a very basic question for restore and recover Oracle 10g database. Our envirnment settings are:
Oracle 10g on Unix, daily database and archivelog backup to Vista NetBackup server. Retention policy is 2. Old backup files are copied from NetBackup server to the tape for record keeping.
I want to restore a database to a point in time. Because our retention policy is setup to 2. The backup files I need have been copied to the tape. So I should ask SYSTEM ADMIN to copy the backup files back to NetBackup server disk or I can ask him to copy backup files to the Unix server that host my Oracle 10g database. Then I can use Rman to do restore and recover. Is this doable? I know normal procedure is to copy backup files I need back to NetBackup server disk, not directly back to database server. Please put your comments here as early as better. I do appreciate your kind help.For sure it is double work, To copy backup files on UNIX host.
Are you using catalog or nocatalog?
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Hi ,
Plase any one can give nme the steps to be followed to export and import oracle 10g database from AIX to AIX and LINUX also.
Waiting for your response.
Thanks..

You dont have to follow any special steps, Export and Import are same on all OS's.

Export and import Oracle 10G database

Hello all
Can anyone tell me once for all how can i backup oracle 10G database and restore it in other computer (export and import)
thanks alot
Ron

Do you can access to metalink?
If not, I copy an paste this doc's....
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Subject: How to perform FULL System Export/Imports
Type: BULLETIN
Status: PUBLISHED
Content Type: TEXT/X-HTML
Creation Date: 18-APR-1994
Last Revision Date: 30-AUG-2002
Purpose
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a Full System Export and Import.
Scope and Application
It is intended to assist users performing FULL System Exports and Imports.
A Full System Export and Import is a useful way to replicate or clean up
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instance. Always check values for the SID and two task driver before
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*Note: On Unix systems, just entering a sub-shell, such as using
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against.
2. When possible, it is advisable to take a physical copy of the
exported database and the database you intend to import into before
starting the import. This ensures any mistakes are reversible.
3. NEVER run a FULL SYSTEM IMPORT on a machine that has more than one
database UNLESS you are 100% sure all tablespaces have been
pre-created. A full import will create any undefined tablespaces
using the same datafile names as the exported database. There are
situations where this is very dangerous:
-> If the datafiles belong to ANY other database, they will be
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the database you are importing into.
-> If the datafiles have names that clash with existing operating
system files.
4. When exporting, it is advisable to also produce a report showing
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Subject: How To Copy an Oracle Database To Another Machine
Type: HOWTO
Status: PUBLISHED
Content Type: TEXT/X-HTML
Creation Date: 12-OCT-2001
Last Revision Date: 01-OCT-2003
goal: How to copy an Oracle database to another machine
fact: Oracle Server - Enterprise Edition
fix:
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and have to have exactly the same database version installed.
1. Make sure the database you want to copy was closed with a SHUTDOWN IMMEDIATE,
SHUTDOWN NORMAL or SHUTDOWN TRANSACTIONAL.
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mount mode. Check the init.ora for the locations where the controlfiles have
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ORACLE_HOME - set to full pathname of the Oracle system home directory
PATH - needs to include $ORACLE_HOME/bin
b. (NT/2000 only) Do 'set ORACLE_SID=<SID>'
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Do
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SELECT NAME FROM V$DATAFILE;
do
ALTER DATABASE RENAME FILE '<oldfullpath>\<filename>' to <
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ALTER DATBASE OPEN;
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thanks,

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Message was edited by:
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Hi,
I had developed my application using oracle 10g enterprise edition and now i wanna to shift the entire thing to oracle 10g standard edition.
i Ha ve query on thiis point.
1) Is it safe to do so.
2) what are the difference between both the edition.
3) what are the restriction i can face if i am moving form 10g enterprise to 10g standard.
4) what are the steps i have to do to do the same.
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Edited by: Anit A. on Sep 5, 2008 12:24 AM

Hi Anit,
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Donald K. Burleson
Oracle Press author
Author of "Oracle Tuning: The Definitive Reference":
http://www.dba-oracle.com/bp/s_oracle_tuning_book.htm

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Talha

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http://www.debian-administration.org/articles/430
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http://www.oracle.com/pls/xe102/homepage
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Radeon HD 3470
GeForce 8600 GT
Radeon HD 3450
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