Spfile init file

One of the most important benefits of the SPFILE is that Oracle has introduced many automatic tuning features into the core of the database. However, you can fully-qualify the path name is the? Warning - After an spfile is created, when you bounce the database you may encounter an error. The addition of the spfile has changed the search path for the Oracle startup deck. Oracle now uses the following path:. Remember that a PFILE is simply a text based file, which means you can copy it to another directory without affecting the Oracle instance.

You can do this with the following syntax. In addition, you can back up the file directly to the preferred location with the command:. All instances in an Real Application Clusters environment must use the same server parameter file. However, when otherwise permitted, individual instances can have different settings of the same parameter within this one file. Instance-specific parameter definitions are specified as SID. The method of starting up the database with a server parameter file depends on whether you create a default or nondefault server parameter file.

Please refer to "Creating a Server Parameter File: Examples" for examples of how to use server parameter files. Find centralized, trusted content and collaborate around the technologies you use most. Connect and share knowledge within a single location that is structured and easy to search.

I have tried to understand through oracle docs but could not get it properly Any body please explain. What is difference between spfile and init. The Oracle spfile is a binary representation of the text based init.

Came into existence in and after Oracle 9i. We do not edit this file using an editor as it is a binary file and may get corrupted and which may lead to your database instance not starting rather it is altered by using the alter system query. The changes come into effect after running the Alter system query and we do not need to restart the database. By default our database uses pfile to start we can change that and create a spfile from a pfile or init.

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Does this mean, that Oracle has to redo its 'auto-tuning' of the various SGA-parts? I would have expected, that the extra amount of SGA would be 'fairly' distributed.

June 17, - pm UTC. I'm going to guess your granule size is 4m. Jeroen, June 19, - pm UTC. Thanks Tom, the granule size indeed explains the little difference.

Regarding the re-tuning, would it be possible to speed-up this process without losing the automatic tuning feature, f. June 20, - am UTC. Thanks again! Jeroen, June 20, - pm UTC. Thanks very much, Tom, for your prompt answers. Amazing how you can find the time for that. I have downloaded the chapter on Memory Management, and will go reading it right now. Thanks again. Help with Installation to 10g and then downgrade to 9.

Smalley, August 16, - pm UTC. I need help Tom. I work in a government facility and we do information security for many hosts. We have an Oracle host which is using Oracle 9. When trying to purchase a 9. We purchased a copy of 10g and are now trying to downgrade to 9. What is the way to sucessfully downgrade after a 10g installation to 9. August 17, - pm UTC. Hi Tom, When I created a pfile from spfile the pfile has lines like the following Please help me in understanding the above.

October 17, - am UTC. Hi Tom, Thanks for your ever valuable help. I am facing an issue with the upgradation from 9.

My spfile is having "? Want to know was it necessary to follow the previous step to do the upgrade? Please help.. I'm not personally aware of the issue - but metalink would be the best place to research that. Given that by replacing the? I understand what an spfile is, where it is and how it is used. I know I can use the the 'strings' command to view it in the OS. My question is simple and I think I know the answer. October 29, - am UTC. No, I do not - not short of using strings in the OS to see the contents of the file.

November 25, - am UTC. Right on! A reader, November 25, - am UTC. You're right, it may be dangerous if the person doesn't know what he's doing, and of course you're suggestion is much better. Please consider removing what I wrote, I'd feel better knowing nobody does something foolish because of me.

Regards, Marius. November 25, - pm UTC. No worries, gives a chance to show the "safer" way so others can see how to do it. Saved my database! I don't use Oracle widely, mostly SQL Server, so when I screwed up my new DB install with a processes parameter that was too low for me to connect, this answer got me back up and running.

Many thanks! August 31, - am UTC. Nabeel, November 08, - am UTC. Why do I have to bounce my DB for these parameter to be active with new values.

A reader, May 02, - pm UTC. In 10g, if the value column of "show parameter spfile" shows a spfile name, can I safely assume that the database instance was started using that spfile? May 03, - am UTC. A reader, May 03, - pm UTC. May 03, - pm UTC. Yuna, May 15, - am UTC. Hi Tom, I have several question about the paramters. It means Oracle will use the real "0" for this parameter or it will select a proper one at the run time? Is this true?