Difference entre spfile, pfile administration oracle. It is read at startup for specific instance characteristics. Oracle 11g provides a new feature to create pfile or spfile using the current values in the oracle memory active instance. Since the spfile was introduced in oracle 9i, i do not use the old pfile any more.
A spfile, server parameter file, is a server managed binary file that oracle uses to hold persistent initialization parameters. Moreover, if pfile is used, you have to know the location of pfile. In oracle database 11g and onwards, the from memory clause creates a pfile or spfile using the current systemwide parameter settings. A spfile doesnt need a local copy of the pfile to start oracle from a remote machine. Pfile vs spfile, diferencias, exportar spfile a pfile oracle.
Orneklerle oracle 11g r2 ve genel kavramlar oracle 11g r2 general concepts with examples was published as a book. Typically you will need to specify the full path and filename for parameter files on your operating system. Can i edit my spfile, or should i recreate by spfile from my pfile. Spfile is a binary file and modications to that can only be done through alter system set command. Is there a view where i can check whether an instance had been started using a pfile or an spfile. Spfile is default file for database start up, that is the reason i did not give any parameter name at start up time. In what order does oracle search for the pfile and spfile locations at database startup time. This parameter can be defined in a client side pfile to indicate the. Jan 26, 2015 understand what options you have for oracle instances parameter file. How to find database is using spfile or pfile in oracle 10g. If you are using asm the spfile then the spfile will be located in shared asm file system. This article presents new feature of 11g for pfile spfile. How to change the asm spfile in 11gr2 logical steps to change the asm spfile create intermediate pfile from the current spfi. If no spfile is associated with the instance, then the database looks for the platformspecific default server parameter file name.
If a parameter is changed using the alter system set command oracle will apply this parameter change to the current spfile. Oracle create pfile from spfile spfile pfile pfile pfile oracle. To support the asm spfile in a disk group, two new fields were added to the asm disk header. Where is the parameter file p file stored in oracle.
If we were trying to change parameters in an unfamiliar database that was handed over from other dba, we have to figure it out whether the database started with spfile or pfile. Let us we discuss pfile or spfile recovery technique without using rman or any kind of backup. The oracle spfile is a binary representation of the textbased init. A database spfile and oracle net configuration file samples. This clause lets you specify a name for the server parameter file you are creating. This file normally reside on the server, however, you need a local copy if you want to start oracle from a remote machine. When the default server parameter file is used by the server, the value of spfile is internally set by the server. This means you no longer need a local copy of the pfile to start the database from a remote machine. By default, a new oracle database will be working on a pfile, so the spfile must be created from the pfile at the sql prompt. This will be useful if you delete the spfile or pfile by mistake. In this post, i am going to explain how we can create recreating the spfile for rac instances. It says that one of the reasons to use spfile is if i use oemoms to startstop database, the pfile needs to be on the machine where oms is installed or pfile should be accessible to the machine running oms. Instead it can only be altered using the alter system command.
Oracle database how to create pfile or spfile using the current. Local copy of pfile required to start database from a remote machine. Goldengate sequence number for trail file has exceeded the maximum threshold. Table 23 pfile and spfile default names and locations on unix, linux, and. First of all lets check out the description of both spfile and pfile. Storing the server parameter file on hardenabled storage the spfile. If you are using an spfile and not a pfile, you will still need to have a file named init.
How to startup an oracle database instance using spfile or. The value of this parameter is the name of the current server parameter file spfile in use. By bane radulovic, oracle database 11g certified master. If you want to download oracle virtual box or vmware workstation player, please click on below links. This parameter is created when opening the oracle instance and then we can change the contents of these parameter files either dynamically or statically. Refer to your oracle operating system documentation for path information. In this article you will get to know the process of how to do multiplexing of control files through pfile in oracle 11g. Examples for examples of how to use server parameter files. The default location of spfile and pfile for linux and windows. The pfile is a textbased file that can be edited on notepad or a similar editor depending on the os. Jan 07, 2018 45 videos play all oracle db online training tutorials point india ltd. To apply new or modified database parameters changes, database restart is.
Jul 20, 2012 where is my oracle asm instance spfile. Parameters in pfile can be edited using any text editor. Hi, in this article, i will explain the parameter files that are very important for oracle database. Oracle provides two different parameter files, pfile and spfile. This parameter can be defined in a client side pfile to indicate the name of the server parameter file to use. Specify memory to create a pfile using the current systemwide parameter settings. The oracle spfile is a binary representation of the text0based init. How to find database is using spfile or pfile in oracle 10g sometimes dba needs to find out database is running by spfile or pfile. Oracle 11g instance is created with a large number of hidden or underscore parameters in the pfile or spfile. Create pfile spfile from memory oracle 11g oracle 10g. Tom i am going through your book effective oracle by design. Hey, you asked the following my database is now using spfile insteed of pfile,how can i alter the database to use pfile without shuting the database down see, once the database is started, oracle doesnt use pfile or spfile, though, you can make changes to the spfile if your database started using spfile using alter system.
In oracle9i, oracle has also introduced the spfile, which is a binary file stored on the database server. How to check whether oracle instance is started using pfile. As we said, the parameters are stored in either a pfile or an spfile. Oracle in our database there are 2 identical parameter files, which are named spfile and pfile. Oracle spfile example oracle consulting, oracle support. Oracle database provides other interfaces for viewing and. Pfile is a text based file and in order to addmodify any database parameters, need to edit the init. Many time we face the issue while starting the oracle instance and to troubleshoot the issue, its always better to know the pfiles path, in oracle 9g all the characteristics of the instance are established by parameters specified in the spfiles but in 10g,11g the parameters defined in the pfiles, to check the pfile location, refer to the following steps. Starting with release 11g, the server parameter file spfile is in a new. In order to use same spfile at startup each rac instance uses its own pfile and that points to one shared spfile on shared storage. How can i tell if my database was started with a spfile. In an oracle rac environment, the created file will contain the parameter settings from each instance. If there are any changes made in the pfile, these will be applied only after the dat. Is it stored with the data files or stored separately.
Converting the spfile to a pfile, editing the pfile and reconverting the corrected pfile to the spfile made oracle happy and me too. The text initialization parameter file pfile must contain namevalue pairs in one of the. Sometimes dba needs to find out database is running by spfile or pfile. The default location of spfile and pfile for linux and.
So the file contains a line something like spfilef. Spfile and pfile not created during installtion of oracle 11g. Shell script to startstop all or one oracle database. If separately, then where is it actually stored on the database. Nov 20, 2017 pfile parameters in oracle 11g list of initialization parameters in oracle 11g. When an oracle database is started, the process will always use spfile. In this post,we would checking out various ways to create spfile from pfile in oracle database. It can also be created directly by the database configuration assistant. How to do multiplexing of control files through spfile server parameter file in oracle 11g. A server parameter file is initially built from a text initialization parameter file using the create spfile statement. The the spfile is really just a flatfile text file, with binary ascii nul character padding at the beginning and end of. Oracle reads its parameters from a file called spfile.
The oracle instance reads the parameter file during startup which are then used. I changed a parameter in such a bad way, that oracle did not start anymore. Inside the pfile are a number of database settings called parameters. A pfile is a static, clientside text file that must be updated with a standard text editor like notepad or vi. To demonstrate i start a database using pfile like sql shutdown immediate database closed. Parameters are checked before changes are accepted. How to do multiplexing of control files through pfile in. Parameter file is a text or binary to store the database initialization parameters. This entry was posted in oracle 11g new fatures by joda3008. Changes which are applied to the instance parameters may be persistent across all startupshutdown procedures. Many time we face the issue while starting the oracle instance and to troubleshoot the issue, its always better to know the pfiles path, in oracle 9g all the characteristics of the instance are established by parameters specified in the spfiles but in 10g, 11g the parameters defined in the pfiles, to check the pfile location, refer to the following steps. Additionally, oracle can read the parameters from pfiles, which are regular text files.
The the spfile is really just a flatfile text file, with binary ascii nul character padding at the beginning and end of each line. The tables and file samples in this appendix are included to illustrate the best practices as they relate to different highavailability architectures. Editing an spfile will corrupt it, and you will not be able to start your database. Some oracle functionality does not work as well if you are not using the spfile. Since the database uses this file during startup all parameter changes persist between shutdowns. Jul 25, 2011 a spfile doesnot need a local copy of the pfile to start oracle from a remote machine. While it is possible to edit the spfile, using editors like vi will corrupt the spfile. Oracle cloud infrastructure database service version na and later oracle database exadata express cloud service version na and later information in this document applies to any platform. Database spfile and oracle net configuration file samples. The sql commands create pfile from spfile and create spfile from pfile are still valid for the asm spfile stored in the disk group. The server parameter file spfile is created from the initialization response. Mar 06, 20 in this post, i am going to explain how we can create recreating the spfile for rac instances. The server parameter file is a binary file that cannot be edited using a text editor.