ORACLE 11g Database Parameters (Datawarehouse) - Recommended/Best Practice

Hi all
What are the generally recommeded database parameter settings for a a VLDB datawarehouse implementation with regards to:
- Online Redo log file size
- Number of Redo log file

Fahd Mirza wrote:
In My data warehouse of size just above 2TB, I have three tablespaces for three different schemas. One is for staging, other is for history and the other is for analysis and some near real time data. I use 3 bigfile table spaces of sizes 700G. The version of database is 11gR1 on Solaris 5.10, and I use ASM.
Fahd,
What's your backup startegy ?
Have you enabled "change tracking" so that rman can use proper incremental backups, or do you let rman scan the entire 700GB file to identify changed blocks, or do you use some type of "split mirror"/"snapshot" method offered by the hardware vendor ?
What's your resilience/recovery strategy ?
The OP is talking about lots of "nologging" activities - is your system similar, or do you force logging and run with a standby to protect yourself against failure.
(I kow I'm addressing the questions to you, but they're really there to prompt the OP to think about some of the related issues, and you may have some good answers that will help him/her.)
Regards
Jonathan Lewis

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General Oracle Database Performance trouble solving best practice Steps

We use Oracle 11g DB on Windows2008R2 as web application backend DB.
We have peformance trouble in that DB.
I would like to know General Oracle Database Performance trouble solving best practice Steps.
Is there any good general best practice document for performace trouble solving in the internet ?

@Girish Sharma: I disagree with this. Many people say things like your phrase "..first identify the root cause and then move forward" but that is not the first step. Any such technique is nothing more than looking at some report, finding a number that you don't like, and attempting to "fix" it. Some people use that supposedly funny term "compulsive tuning disorder" (first used by Gaja Krishna Vaidyanatha) to describe this approach (also advocated in this topic by @Supriyo Dey). The first step must be to determine what the problem is. Until you know that, all those reports you mentioned (which, remember, require EE plus pack licences) are useless.
@teradata0802, your best practice starts by finding the problem. Is it, for example, that the overnight batch jobs don't finish until lunchtime? A screen takes 10 seconds to refresh, and your target is one second? A report takes half an hour, but you need to run it every five minutes? Determine what business function is causing your client to lose money because it is too slow. Then investigate what it is doing, how, and why. You have to begin by focussing on the problem, not by running database-wide reports..

Needed: system requirements, recommendations & best practices

I realize that this is just a beta release but I think it'd be nice if the system requirements for this VS.NET add-in were clearly defined in a single post/page.
For example, Christian Shay's reply to "Oracle Release Requirements" by [170516] indicates that "For the beta release you should be able to use Oracle Database version 8.1.7 or later." However, Christian's reply in the "Oracle DB 8.1.7 connection problems" thread started by [151631] indicates that "you'd need to upgrade to at least 8.1.7.4.1 for it to work."
Which is it??? I'm using Oracle8i Enterprise Edition Release 8.1.7.2.0 and I don't want to install this add-in if it's not going to work with my current environment. I realize I can download 10g but my employer is using 8.1.7.2 and that's my target DB for now.
In browsing this forum, I've read a number of posts with suggestions (such as installing the version 10 client in a new Oracle Home, etc.) and I think it'd be nice to see a basic set of requirements/recommendations/best practices in a single place for all to read.

Hi
Can you also include the following in the FAQ?
1) ODP.NET if installed prior to this beta version - what is the best practice ? De-install it prior to getting this installed etc ..
2) As multiple Oracle home's have become the NORM these days - this being a Client only should probably be non-intrusive and non-invasive.. Hope that is getting addressed.
3) Is this a pre-cursor to the future happenings like some of the App-Server evolving to support .NET natively and so on??
4) Where is BPEL in this scheme of things? Is that getting added to this also so that Eclipse and .NET VS 2003 developers can use some common Webservice framework??
Regards
Sundar
It was interesting to see options for changing the spelling of Webservice [ the first one was WEBSTER]..

Oracle 11g Database Configuration Assistant Hangs At 45% During 1st Install

Platform: Windows Vista 64 Bit Version
Downloaded: Oracle 11g Database 64 Bit
Service Pack 1
Greetings to all my Oracle Seniors. I have been attempting in vain to install the Oracle 11g database software package fully. I was able to complete the initial installation and made it to the second recommended action which was the Database Configuration Assistant operation. After 3 attempts, the progress bar stalled at 45%. I tried to look at the log file cfgtoologs (cloneDBCreation, and CloneRmanRestore), but it said that I didn't have permission. My pre-check cleared OK on everything. So, please direct me as to how to correct this issue.
Thanks
Preston
System Integrator

Well, that is not much of an option right now. I discovered that I have to reinstall the XP Pro OS after attempting the 11g installation 4 times and the install always stalled at 69% during the initial installation. I did have Windows Service Pack 3 installed on the system. I down graded and added 1 G of additional memory and checked the pre-check with no problem. But, the install continued to stall at 69%. So, and, yet, here we are.
Now in regards to the metalink notes, I am new to the forum, so I don't know my way around quite yet. Isn't the metalink the paid suppport option? If so, I don't have that access.

Upgrade JRE version of Oracle 11g database

Hi all.
I need to upgrade the version of the JRE installed on a Oracle 11g database, migrating from 1.5 to 1.6.
Any suggestions or practical guides that i can follow ?
Thanks
A.

Pl post exact OS and database versions. Are you wanting to upgrade the Java version in the database ? If so, that is not possible.
Is It Supported to Update /Upgrade the Default JDK/JRE in Oracle Home? [ID 1449674.1]
OracleJVM Install and Upgrade FAQ [ID 825306.1]
Java update of the JDK and JRE Installed In Oracle Database Home [ID 418399.1]
Master Note for Oracle JVM [ID 1098505.1]
Re: update jdk from Oracle 11g? (version is > EOL)
HTH
Srini

Dropping sample schemas like scott,hr,bi from Oracle 11g Database.

Hi Friends,
Do any one have the query to drop all the sample schemas from Oracle 11g Database.Any steps need to be
performed to drop all the schemas.
Best regards,

Hi;
Please see:
drop all objects owned by schema
drop all objects owned by schema
Regard
Helios

Factors for increase in memory occupied by Oracle 11g database

I wanted to know all the possible factors which can account for the increase in the memory required for an Oracle 11g database. Let’s take an example,
1) Say if the memory allocated for an Oracle 11g instance is 8GB which is 50% of the memory of 16GB allocated to the machine on which Oracle 11g is installed.
2) The max sessions are 300.
With this example in mind, I had the following queries:
1) Is the memory taken by 100 sessions or 300 sessions going to be within the limit of 8GB allocated to the Oracle?
2) Say if the max sessions is increased to 400, would the memory taken the 100 extra sessions would be within 8GB or would that be extra?
I hope my query is clear.
Please revert with the reply to my query.
Regards

Memory is allocated for the session only when that session is created by the listener, and the memory used by that session will fluctuate depending on the workload it's doing.
300 or 400 it won't pre-allocate all the memory for the fixed maximum number of sessions, it's dynamic. What oracle does is allocated all the memory you gave it in the PGA and the SGA and will do it's best to work with it for the current workload, it won't suddenly eat more memory without you telling it's okay to.
The only scenario I could see this happening is if you have a lot of sessions and a small PGA. In that case, oracle does go ahead and eat more memory than you gave it because it can't make due with the current PGA. So it eats more memory so sessions can be created and maintened. See PGA over- allocation.
To quote the good ol' docs:
Over allocating PGA memory can happen if the value ofPGA_AGGREGATE_TARGET is too small. When this happens, the Oracle Database cannot honor the value ofPGA_AGGREGATE_TARGET and extra PGA memory needs to be allocated.

Establish 32-bit ODBC connection to 64-bit Oracle 11g database

Hi Everyone,
Just to set the scene:
PC with Windows 2003 server x64 OS installed, Oracle 11g 11.1.0.7 64-bit installed and MS Office 2007 installed.
I am looking for advice on the best way to establish an ODBC link so that MS Access 2007 (32-bit) can connect to the Oracle 11g (64-bit) database.
There are known issues, see [http://support.microsoft.com/kb/942976|http://support.microsoft.com/kb/942976] (which I have hit) when attempting to use a 64-bit ODBC DSN within MS Access 2007. This means that I need to setup and install an Oracle 11g 32-bit ODBC driver to be used against the Oracle 11g database (TNS listener also running 64-bit).
Any thoughts on the best approach I should take to do this?
Regards,
Leigh.

The more information section of the MS support article doesn't give me much to go on other than to explain the differences in how user and system DSNs are displayed and managed between the 2 different bit versions of ODBC administrator and how this information is stored in the different registries (64-bit and WOW64).
I have been able to install 32-bit Oracle11g instantclient and its ODBC driver successfully and then in turn create the 32-bit ODBC DSN, however I am unable to connect to the 64-bit database when I attempt to test the DSN. I have updated the Windows PATH environment variable to include both the path of the Oracle11g DB server and instantclient homes as well as creating a TNS_ADMIN environment variable to point to the location of the Oracle11g TNSNAMES.ORA and the 64-bit 11g listener. However despite this I still get the error when testing the DSN:
Unable to connect
SQLState=S1000
[Oracle][ODBC][Ora]ORA-12541: TNS:no listener

Oracle 11g Database List of Books

Good day,
Where can i get Oracle 11g Database Books in HTML/PDF format on Oracle website as we have with 9i and 10g? I have worked with 9i, not with 10g is it ok to practice with 11g whithout knowledge of 10g.
Regards
Ans

You can also go here http://tahiti.oracle.com/ and
yes we need to wait.
AdithWhat/why do we need to wait for?
http://tahiti.oracle.com/ => "Oracle Database documentation, 11g Release 1 (11.1). " => "Master Book List" => http://www.oracle.com/pls/db111/portal.all_books

What should i do with an Oracle 11g Database, MySQL database and a dump file.

I just joining to a new work field, almost about a database and i know "NOTHING" about this field.
My company has a system that running by Oracle Database, the problem is that Oracle Database will cost a lot of money when my company expands.
So the quest is converting Oracle Database to MySQL database.
Of course i cant try to convert it in the main Database, so i create one Oracle 11g Database on my LocalHost, and it already actived in " Localhost:1158 " etc.
I have another Sever test that already set up MySQL database, and a dump file from the system.
So I want to ask these 2 questions :
1. How to create an new Oracle Database from that dump file ?
2. Is it alright if i use tool to convert Oracle Database into MySql, or i should do it manually ?
Thanks alot.

I just joining to a new work field, almost about a database and i know "NOTHING" about this field.
My company has a system that running by Oracle Database, the problem is that Oracle Database will cost a lot of money when my company expands.
So the quest is converting Oracle Database to MySQL database.
I predict that converting to MySQL will cost your company more as it expands. As you expand managing contention becomes more important - Oracle does this for you. I do not think MySQL does, so you'll have to write more code to deal with this, costing the company money. A big part of making application scalable and reliable is to use stored procedures, how good are MySQL's compared to PL/SQL's. What other features are there that MySQL has that will benefit your company that Oracle doesn't. What do you need to think about as your company expands that need to be taken care of in the database. I would have thought a migration from MySQL to Oracle would be more common to deal with expansion.
As you know "NOTHING" you need to think about what each database can give you for the next 10 years to cope with you businesses potential requirements, and extimate how much it will cost to implement these requirements, then make the decision

What are the privileges required for explain plan in Oracle 11g database

I am facing the problem in doing a explain plan for a view in Oracle 11g database. When I select from the view like this:
select * from zonewisearpu
It does a select on the view but when I give explain plan like
explain plan for
select * from zonewisearpu
I get the error like insufficient privileges.
Please let me know if things are getting missed out as I guess system level privileges are required to execute this.
I hope, my question is clear.
It’s a humble request to revert urgently if possible as I need to complete a task and do not know the way out.
Regards

975148 wrote:
Thanks for your reply. I have found out that an explain plan is possible on the user's own objects and is not possible on the granted objects from a different schema. For eg, if I do a explain plan on a view querying on tables from a different view, it would not allow the explain plan to proceed. This could mean that explain plan needs different privileges than just a select.
Requesting for a revert to this.
Here is a simple test case that I have perfomed
SQL> create user test1 identified by test1;
User created.
SQL> create user test2 identified by test1;
User created.
SQL> grant connect, resource to test1,test2;
Grant succeeded.
SQL> create table test1.tab1 as select * from v$session;
Table created.
SQL> connect test2/test1
Conencted.
SQL> show user
USER is "TEST2"
SQL>
SQL> explain plan for
2 select sid,serial#,status,username from test1.tab1 where username<> '';
Explained.
SQL>
So, as can be seen I am able to do a explain plan from user test2 for tables belong to user test1.
As far as privileges are concerned, following is the list
SQL> select * from dba_role_privs where grantee in ('TEST1','TEST2') order by 1;
GRANTEE                        GRANTED_ROLE                   ADM DEF
TEST1                          CONNECT                        NO YES
TEST1                          RESOURCE                       NO YES
TEST2                          CONNECT                        NO YES
TEST2                          RESOURCE                       NO YES
SQL>
SQL> select grantee,owner,table_name,privilege from dba_tab_privs where grantee in ('TEST1','TEST2') order by 1;
GRANTEE    OWNER      TABLE_NAME           PRIVILEGE
TEST2      TEST1      TAB1                 SELECT
SQL>
SQL> select * from dba_sys_privs where grantee in ('TEST1','TEST2') order by 1;
GRANTEE    PRIVILEGE                      ADM
TEST1      UNLIMITED TABLESPACE           NO
TEST2      UNLIMITED TABLESPACE           NO
SQL>

How to monitor oracle 11g database sessions on Windows 2008 server?

Hi Experts
How to monitor the Oracle 11g database sessions on Windows 2008 server (other than SQL Developer tool), which procedure or query is taking more time with Java application.

Recently i found this tool- myorasql on the net to monitor the performence of database, easy to setup and check the performence. i never tested it but seems impresive. It is free and i think it would be use ful to you.
http://myorasql.com/
You can also use Quest - Toad or sqlplus if you are very good at sql commands and all dictionary tables or OEM/EM grid if it is configured .

Difference btween oracle 10G database & oracle 11G database

Hi
i have a web application have 10G database engine, now i will upload it on a host server witch supports oracle 11G database.
can i export Dump file from my Oracle10g database and import it into oracle 11G database successful.
what can i do?
please suggest me
thank you

Hi,
Difference btween oracle 10G database & oracle 11G database Here is a complete list:
http://www.dba-oracle.com/oracle11g/oracle_11g_new_features.htm
can i export Dump file from my Oracle10g database and import it into oracle 11G database successful.Yes. Oracle supports backward compatibility . . .
You mght not, however do it the other way . . .
Hope this helps . . .
Donald K. Burleson
Oracle Press author
Author of "Oracle Tuning: The Definitive Reference"
http://www.rampant-books.com/t_oracle_tuning_book.htm
"Time flies like an arrow; Fruit flies like a banana".

How to mask data in oracle 11g database release 1

how to mask data in oracle 11g database release 1
my environment is
Database: 11g release 1
os: AIX 6 (64 bit)
GC:10g release 1

DBA-009 wrote:
thx but how i can mask data with above give environment?What does "mask data" mean to you and what is the environment you are referring to?
Telling us that you are using 11.1 helps. But it is far from a complete description of the environment. What edition of the database are you using? What options are installed? What Enterprise Manager packs are licensed? Is any of this changable? Could you license another option for the database or another pack for Enterprise Manager if that was necessary?
What does it mean to you to "mask data"? Do you want to store the data on disk and then mask the data in the presentation layer when certain people query it (i.e. store the patient's social security number in the database but only present ***-**- and the last 4 digits to certain sets of employees)? Do you want to hide entire fields from certain people? Do you want to change the data stored in the database when you are refreshing a lower environment with production data? If so, do you need and/or want this process to be either determinisitic or reversable or both?
Justin

Apex 3.2 install in oracle 11g database

hi,
how to install oracle apex 3.2 in oracle 11g database and any other tool have like oracle query browusr (need to build a query drag and drop).
regards
den

Den
Oracle 11g comes with apex. You should refer to the documentation at...
[http://www.oracle.com/technology/products/database/application_express/index.html]
to install it.
Please don't keep reposting the same question regarding the replacement for query browser, just update your original thread if you need further information.
Regards
Ben

ORACLE 11g Database Parameters (Datawarehouse) - Recommended/Best Practice

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