Oracle Database "Compatible" Parameter - Understanding

Heloo,
Please reply on my below points related to "Compatible" parameter:
1.If we are running 10.2.0.4 on a site and the initialization parameter setting is 10.2.0.3.0 then what BAD impacts it can give on Database. Its our online banking LIVE environment.
2.Can we go back to 10.2.0.3.0 from 10.2.0.4.0?

Hi;
1.If we are running 10.2.0.4 on a site and the initialization parameter setting is 10.2.0.3.0 then what BAD impacts it can give on Database. Its our online banking LIVE environment.You are working on same level 10g, if you move your database to 9i to 10g or 10g to 11g than i belive you can look your question answer. But for your issue i belive its not neccessary
2.Can we go back to 10.2.0.3.0 from 10.2.0.4.0?Yes you can. Please see:
Downgrade from 10.2.0.4 to 10.2.0.3
Downgrade from 10.2.0.4 to 10.2.0.3
Regard
Helios

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11gr2 database compatible parameter

I have a 11g r2 database and the compatible parameter was originally set to 11.2.0.0.0. I did an alter system set compatible='10.2.0.4' scope=spfiile;
Now when I try to start the database, it says control file version 11.2.0.0.0 incompatible with ORACLE version.
When I do a startup nomount and try to alter system set compatible='11.2.0.0.0' scope=spfile, I get ORA-32012: SPFILE format is inconsistent with value of COMPATIBLE parameter.
I also tried doing a create pfile from spfile and it gives me the same error. Is there anyway to fix this?
On another note, the reason why I tried this was because I tried installing Grid Control 10.2.0.3 using an existing database with this 11gr2 database. It doesn't let me proceed saying the database must be 10.2 or higher. It seems to not like my 11gr2 database version so that's why I tried changing the compatible parameter. Anyway to get around this?
Thanks for your help.

sb92075 wrote:
alter system set compatible='11.2.0.0.0' scope=spfile
I also tried doing a create pfile from spfile
As for shutdown abort and create the spfile, Why are you trying to CREATE SPFILE???????
it can't find the spfile in the dbs directory because I'm using ASM.Please make up your mind.
Either spfile exists or it does not.
Are you having a problem with the ASM instance or "normal" (OLTP?) instance?
Too bad CUT & PASTE are broken for you!Why the hostility? It was a typo. I was creating a pfile, not spfile.
Let me clarify. I am using ASM for this "normal" 11gr2 instance, so my spfile is located in a diskgroup called +DATA. When you shutdown the database and try to create a pfile from spfile, it looks for the spfile in the default directory under $ORACLE_HOME/dbs. So since I'm using ASM, my spfile is not located in this directory and oracle can't find the file.
Anyways, after some googling I answered my own question. I had to use create pfile from spfile='+DATA/emrep/spfileemrep.ora';
Thanks anyways...
But any direction on installing Grid Control using a 11gr2 existing database for the repository is appreciated.

Is Oracle database Compatible with Times Ten database?

Hello All,
I need to use a temporary database in Oracle for some months.
Later on, I will need to migrate all data to a Times Ten database.
1. My doubt is if Oracle and Times Ten databases are compatible with
each other (specially when having this kind of cases) ?
2. In case the answer is YES to question 1, I would like to know if there are some
restrictions in that compatibility (type of data, any other issue, etc)
Best Regards
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Ruben,
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Compatible parameter set too specifically will it affect my database?

Hello,
I performed an upgrade from 9 to 10.2, when setting the compatible parameter I set that to 10.2.0.5 instead of 10.2.0.
I know that according to note 830576 and the guide, that parameter should be 10.2.0 but since I can't change it, I want to know if there would be any problems with the database or the SAP system
Thanks in advance

Hello Maria,
at first you should understand what happens when you set this parameter. Please check the official documentation for a detailed explanation: http://docs.oracle.com/cd/E11882_01/server.112/e25494/create005.htm#ADMIN11112
I want to know if there would be any problems with the database or the SAP system
Running your Oracle database with a 4 digit compatible parameter is not a "problem", but maybe you are not able to perform a rollback of the 10.2.0.5 patchset without a restore anymore. That's the reason why SAP (and other vendors) recommend to set only 2-3 digits of the oracle version.
Only Oracle knows, If the current patchset 10.2.0.5 (already) changed some stuff that is incompatible with an older 10g R2 patchset.
- A new feature stores any data on disk (including data dictionary changes) that cannot be processed with your previous release.
- An existing feature behaves differently in the new environment as compared to the old environment. This type of incompatibility is classified as a language incompatibility.
You can try to lower it and restart your DB - if your database is already incompatible you will get an ORA error.
Regards
Stefan

Oracle 9.2.0.7 vs Oracle 10.2.3 with COMPATIBLE parameter set to 9.2.0.7

Hi,
First off, I am NOT an oracle DBA (or even a DBA!), so please excuse my ignorance or errors contained within this post.
My client is currently planning to upgrade their 9.2.0.7 database server to 10.2.3. Reading through the oracle upgrade documentation, I came accross the compatible parameter, and further more you can set it to 9.2.0.7. I realise that by setting this, many new features introduced in Oracle 10g will not be available - however getting of the unsupported 9.2.0.7 platform is priority.
Can someone please advise what are the differences between a real 9.2.0.7 database server versus a 10.2.3 (with 9.2.0.7 compatible) server. By setting this will it guarantee sql scripts and external applications continue to work after the upgrade? I.e the list of compatibility issues detailed in the oracle database upgrade guide, will these issues be made irrelevant by this setting?
Your expert knowledge is appreciated.
Regards,
Shan

When upgrading from 9i to 10g the compatible parameter should be set to 9.2.0. All of the new feature will only be available when the parameter is set to 10.0.0 or higher and the instance restarted.
Once an instance has been restarted with a compaticble value of 10.0.0 it can never be set back to 9.x.
Why do you think the upgrade is required if you still want to use the features of 9.2.0.7?

Mismatch between COMPATIBLE Parameter and Oracle Version

Hi,
If the ORACLE version is say 11g but the compatible parameter in init.ora is say 9.2.0 or 8.1.7 what will be the effect on the database?
Will the database behave as like 11g or of the lower version?
If we alter the init.ora to the new version for compatible paremeter will it affect DB rebooting?
This is an interview question and i could not answer.
Please let me know the answers.

If the ORACLE version is say 11g but the compatible parameter in init.ora is say 9.2.0 or 8.1.7 what will be the effect on the database?
Will the database behave as like 11g or of the lower version?
If we alter the init.ora to the new version for compatible paremeter will it affect DB rebooting?
This is an interview question and i could not answer.Here, database created in 11gR2, if try to set lower compatibility it wont be allowed, Below is example.
Check this article of TKyte.
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:485421569569
Init.ora Parameter "COMPATIBLE" Reference Note [ID 30699.1]
SQL> show parameter compatible
NAME                                 TYPE        VALUE
compatible                           string      11.2.0.0.0
SQL> alter system set compatible='10.2.0' scope=spfile;
System altered.
SQL> shut immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup
ORACLE instance started.
Total System Global Area 778387456 bytes
Fixed Size                  1374808 bytes
Variable Size             276825512 bytes
Database Buffers          494927872 bytes
Redo Buffers                5259264 bytes
ORA-00201: control file version 11.2.0.0.0 incompatible with ORACLE version
10.2.0.0.0
ORA-00202: control file: 'C:\ORACLE\ORADATA\ORCL\CONTROL01.CTL'
SQL>SID3
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Handle:      SID3
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Name      Amritansu Ray
Close the thread if answered, Keep the forum clean.
Edited by: CKPT on Feb 15, 2012 9:54 PM

Difference between compatible.rdbms in asm and compatible parameter in database

Hi Gurus,
Here i have small doubt. What is the difference between compatible.rdbms and compatible parameter in database.
We are having 2 node rac on solaris. When i checked at ASM instance level i found compatible.rdbms is set to 10.1.0.0.0 and compatible.asm is 11.2.0.0.0 and compatible parameter in database is set to 11.2.0.0.0.
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Thanks & Regards,
Venkata Poorna Prasad.S

Hi,
I think you should check this
COMPATIBLE.RDBMS :Administering ASM Disk Groups
COMPATIBLE Oracle :Introduction to the Upgrade Process for Oracle Database
HTH

How to change COMPATIBLE parameter while creating the database using DBCA

I have installed 10.2.01.0 on centos 4.7
Now i want to create database with COMAPTIBLE parameter 9.2.0.1
I m trying to create database through DBCA, changed the initialization parameter COMAPTIBLE to 9.2.0.1.
But gives me error
ORA-19583: conversation termintated to error
ORA-19870: error reading backup peice /opt/oracle/assistants/dbca/templates/Seed_Database.dfb
ORA-00600: internal error code,arguments: [krbrckhr_compressed],[opt/oracle/assistants/dbca/templates/Seed_Database.dfb],[29],[30],[11420],[],[],[]
ORA-06512: at "SYS.X$DBMS_BACKUP_RESTORE", line 5149
ORA-06512: at line 16
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But i have to set compatible parameter as 9.2.0.1....
Can anybody tell me how to create database using 10g R2- 10.2.0.1.0 with compatible parameter 9.2.0.1

Thank you for your response.
I have tried that opting.
After creating the database with COMAPTIBLE parameter 10.2.0.1.0 changed that parameter in init.ora file to 9.2.0 and start the database.
But at that time getting
ORA-00201: contorl file version 10.2.01.0 incompatible with ORACLE version 9.2.0.0
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How to pass a date parameter from report builder query designer to oracle database

i'm using report builder 3.0 connected to oracle database. i'm trying to pass a date parameter in the query with no success, i don't
know the exact syntax. I've tried :
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Hi Gorgo,
According to your description, you have problem when in passing a parameter for running a Oracle Query. Right?
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function. For your self-testing, you can try the query in sqlplus/sql delveloper. Since your issue is related to Oracle query, we suggest you post this thread onto Oracle forum.
Best Regards,
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When to change COMPATIBLE parameter while upgrading to Oracle 11G

We are planning to upgrade from Oracle 10.2.0.4 on AIX to Oracle 11.2.0.2 soon.
While reading oracle upgrade documents and from oracle upgrade blog, it is mentioned that once we change compatible parameter,
we will not be able to catdwgrd.sql to downgrade.
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Thank You
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Hi,
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Be sure you check what Tom says about the COMPATIBLE parameter (it's interesting to know exactly what it covers, it does not cover the optimizer features etc.) : http://asktom.oracle.com/pls/apex/f?p=100:11:0::::P11_QUESTION_ID:485421569569
Best regards
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Is Forms 10g compatible with Oracle database 8.1.7.4.0 ?

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Changes on Oracle Database Parameter when you increase your WP

Hi,
I need to know what oracle parameter do I need to change when I increase the number of WP.
I know from note 124361, you need to increase the following:
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Hi,
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MAX_CONNECTIONS
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Reference Note : 830576 - Parameter recommendations for Oracle 10g
If you are not using JAVA Stack then you can omit the Java stack related parameter.
regards,
kaushal

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I do not believe you will find MOS Docs that describe the architecture. Have you checked the docs ? What specific information are you looking for ?
Introduction to Oracle Database
Introduction to Oracle Database
HTH
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IS IT ORACLE DATABASE -APPLICATION COMPATIBLE WITH Windows 2008 R2

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Hello,
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INIT.ora-COMPATIBLE parameter

Hi,
My oracle version is 11.2.0.2 but in INIT.ora the parameter COMPATIBLE is set to 10.1.0.2.0.How does it impact DB?Does it mean that optimizer will use 10.1.0.2 features? Does it affect the performance of DB/queries in any manner?How will it impact if i change the vaue of this parameter t0 11.2.0.2 in INIT.ORA?Please throw some light on it
SQL*Plus: Release 11.2.0.2.0 Production on Mon Sep 26 12:59:29 2011
Copyright (c) 1982, 2010, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> show parameter compat
NAME TYPE VALUE
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Thanks Hemant again.
Pasted from the link.
<How the COMPATIBLE Initialization Parameter Operates
The COMPATIBLE initialization parameter operates in the following way:
It controls the behavior of your database. For example, if you run an Oracle Database 11g Release 2 (11.2) database with the COMPATIBLE initialization parameter set to 10.1.0, then it generates database structures on disk that are compatible with Oracle Database 10g Release 1 (10.1). >
So eventhough the oracle version is 11.2.0.2.0 it works more or less like 10.1.0.2.Is my understanding correct?If so,then there is no point in upgrading oracle to 11.2 if this parameter has a lower value.Pls correct me.
Thanks.

Oracle Database "Compatible" Parameter - Understanding

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