Oracle xml db is managed internally through a configuration file, xdbconfig. Also, you can run this query to see if the database was started via an spfile. The oracle database tries to initialize looking for the following files in the order they appear in the following list. Hi, are you sure the parameter is of the right database have you tired starting the database from sqlplus prompt so the use of pfile is required. Please bear in mind that you are not using the default parameter file.
With shared server, many user processes connect to a dispatcher. Oracle xml db repository treats certain files as xml documents, based on their file extensions. Hi all i have a issue, i been struggling with this for few days now, one of the db instances would not start, the following commands and results are lited. Let us we discuss pfile or spfile recovery technique without using rman or any kind of backup. Since the database uses this file during startup all parameter changes persist between shutdowns. Inside the pfile are a number of database settings called parameters. Create spfile from pfile share improve this answer. Rman database restore from asm to file system bright dba. Editing an spfile directly will corrupt the file and the start up of the database or instance will not be possible. Spfile system parameter file and also known as server parameter file is used at the time of the database startup. Jan 21, 2002 the following create spfile creates a spfile in a nondefault location from a pfile located in a nondefault location. The spfile has a parameter set which is not allowing the database instance to start using the spfile. Stack overflow for teams is a private, secure spot for you and your coworkers to find and share information. A significant advantage of the shared server model over the dedicated server.
Hi how can we start database by default using spfile. Jun 25, 2019 a binary server parameter file spfile can now be created from the textbased init. The parameter settings used to start the instance can be located from the alert. When such files are inserted into the repository, oracle xml db preparses them to identify the schema location or uses the default mapping if present and inserts the document into the appropriate default table. Oracle database uses wrong parameter file database. Remove the dispatcher by removing the oracle xml db dispatcher entry from the init. Push backup filespfile to target server on target server 4. An idle shared server process from a shared pool of server processes picks up a request from the common queue this approach enables a small pool of server processes to serve a large number of clients. These entries can be used to created a valid spfile. I have seen alert log it is showing message like this. Administering database instances and cluster databases. May 30, 2003 oracle s traditional method of storing parameters in the init. As spfile is a server side binary file, local copy of the pfile is not required to start oracle from a remote machine. This post explains which initialization file can be used to start an instance, depending upon if a spfile or init.
Rman restoring the spfile oracle consulting, oracle. A policymanaged database is defined by cardinality, which is the number of database instances you want running during normal operations. I cleaned up a little mess with a deprecatedobsolete parameter in the spfile. The maximum number of network sessions to allow for each dispatcher. When you issue the sqlplus startup command, the database attempts to read the initialization parameters from an spfile in a platformspecific default. A spfile, server parameter file, is a server managed binary file that oracle uses to hold persistent initialization parameters. To start an instance, the database must read instance configuration parameters the initialization parameters from either a server parameter file spfile or a text initialization parameter file. As we said, the parameters are stored in either a pfile or an spfile. You are using the parameter file created from spfile sql create pfilec.
The database didnt start and i had to create a pfile from spfile, remove the parameter and recreate the spfile. Creating a server parameter file spfile oracle dba on linux. Total system global area 159383552 bytes fixed size 1246820 bytes variable size 96471452 bytes database buffers 58720256 bytes redo buffers 2945024 bytes database mounted. If you start the oracle instance and specify pfilexxx then oracle will use the oldfashioned pfile as. Rman database restore from asm nonrac to file system nonrac 0. A policymanaged database runs in one or more database server pools that the cluster administrator creates in the cluster, and it can run on different servers at different times. As an alternative to using oracle enterprise manager to configure oracle xml db, you can configure it directly using the oracle xml db configuration. It says that one of the reasons to use spfile is if i use oemoms to start stop database, the pfile needs to be on the machine where oms is installed or pfile should be accessible to the machine running oms. A policymanaged database runs in one or more database server pools that are created in the cluster by a user assigned the crs administrator role, and it can run on different servers at different times. Sometimes dba needs to find out database is running by spfile or pfile. I thought of creating a pfile from spfile, changing dispatchers and then creating spfile from pfile. The shared server architecture enables a database server to allow many user processes to share very few server processes, so the number of users that can be supported is increased. Mount database continue reading rman database restore from asm to file.
This chapter explains the startup and shutdown tasks for database components and well as how to administer parameters and parameter files in oracle rac. But even the pfile created by oracle is not working correctly. Ok tom i was offering the following way of working around having to recreate the init. One exciting new feature of oracle is the removal of the init. Before oracle9i, oracle instances were always started using a text file called an initsid. Oracle database dispatcher and shared server process. You change the value of a parameter in a parameter file in one of the following ways. The network description of the endpoint on which the dispatchers listen, including the protocol address.
Server parameter files are binary files that exist only on the server and are called from client locations to start up the database. How to recreate the spfile for rac instances where the spfile. Database administrators can start dispatchers and shared servers with the sql alter system statement without having to restart the instance to start shared servers. Developers and dbas get help from oracle experts on. This chapter describes how to configure dispatcher. How to recreate the spfile for rac instances where the. This chapter describes how to administer oracle real application clusters oracle rac database instances and oracle rac databases. Before diving into change and storage of parameters, it is important that you understand the concept of inheritance. Once you under stand inheritance within the oracle database 12c, you will grasp how parameters can be changed and stored for pdbs. The shared server architecture uses a dispatcher process to direct client connections to a common request queue. Oracle database initializationserver parameter file. Even if you don not specify the pfile or spfile database starts itself.
However, oracle requires that you start an instance for the first time using the pfile and then create the spfile, which is discussed later in the article. When starting an oracle instance with the simple command startup, oracle will first look for a binary spfile in the default location. Learn more how to check whether oracle instance is started using pfile or spfile. Login to sqlplus, scope has to spfile and sid has to be supplied. When is specified it applies to all instances if it is a cluster. If you use the same database name for the standby and primary, you will have to delete the database from the standby db system by using the dbcli deletedatabase command before you can run the dbcli createdatabase command described below. To demonstrate i start a database using pfile like sql shutdown immediate database closed. Ora file has given way to a more robust method the server parameter file spfile. Since version 9i, oracle has been promoting using it more as compared to the traditional parameter files. How to startup an oracle database instance using spfile or. Aug 07, 2011 create a database manually on windows in 11g. Using alter system reset one can delete parameter from spfile if the parameter is in the spfile. To see whether a pfile opf spfile was used at startup time, the first place to check is the alert log, especially of the startup command contains the pfile or spfile clause.
Tom i am going through your book effective oracle by design. Oracle database trace file 10053 to understand the optimizer cbo oracle database oracle automatic storage management cluster file system acfs. Oracles traditional method of storing parameters in the init. If a parameter is changed using the alter system set command oracle will apply this parameter change to the current spfile.
The dispatcher directs multiple incoming network session requests to a. Server parameter files let you make persistent changes to individual parameters. If you have a valid pfile then you will not need to perform step 1 of the following process. How to deletereset a parameter in spfile using alter system. Rman restoring the system parameter file spfile spfile system parameter file and also known as server parameter file is used at the time of the database startup. A database instance starts on all servers that are in. Rman restoring the spfile burleson oracle consulting. In most cases, the new value takes effect the next time you start an instance of the database. Db has not been restarted then why the spfile read it is showing because as per my understanding it shows message like this when we start the db.
One db instances doesnt start on rac oracle community. Learn what truly works in converting and maintaining your parameters without ever having to use an editor again. Id have to shutdown, since my spfile is in use by the instance. Oracles automatic memory management and the spfile. A binary server parameter file spfile can now be created from the textbased init. Spfile should only be modified through alter system set command. To create an spfile you must have a preexisting init.
717 601 351 915 404 1032 1511 532 1221 1430 1568 125 624 672 1017 21 1032 1207 636 828 1118 1018 667 1454 837 1200 457 1064 1286 338 72 77 1439 27 29 1059 945 200