Oracle FAQ Your Portal to the Oracle Knowledge Grid

Home -> Community -> Mailing Lists -> Oracle-L -> RE: Initalization files, etc

RE: Initalization files, etc

From: Niall Litchfield <>
Date: Mon, 24 Nov 2003 13:54:31 -0800
Message-ID: <>

Hi VirVit

> -----Original Message-----
> From: [] On
> Behalf Of VirVit
> Sent: 24 November 2003 07:54
> To: Multiple recipients of list ORACLE-L
> Subject: Re: Initalization files, etc
> > > 1) What difference between SPFILE and PFILE?
> >
> > Big one. It's best described in the concepts manual as well
> as in the
> > DBA
> guide.
> > To make long story short, you can modify SPFILE from
> sqlplus which is
> > not possible with PFILe. SPFILE is "binary" (quotes are
> here because
> > it's not
> very binary, just a little),
> > while PFILE is a standard text file.

This is a great description of the difference.

> >
> > > 2) Where by default Oracle search these files when
> instance starts?
> >
> > In %ORACLE_HOME%\DBS directory.
> Well. But, I have Oracle installed by default to d:\oracle
> It's structure is:
> d:\oracle\
> admin
> oradata
> ora92 (it's my home dir)
> in admin I have pfile\init.ora.<long number> with pfile
> structe (plain text) and in
> ora92\databases\spfilevirvitdb.ora (seems SPFILE as it in
> binary format).

On windows by default Oracle will look in %oracle_home% (prob d:\oracle\ora92 from your description)\database for these files. Thus I expect you to be starting your database with spfilevirvitdb.ora. You can tell be typing show parameter spfile when in sqlplus as system/sys.

> In Windows Service Params I've found no specification of path
> to PFILE or SPFILE. So, where Oracle finds these files?

Specified by oradim at db creation and can be read from HKEY\local machine\software\oracle in the registry.

HTH Niall

Please see the official ORACLE-L FAQ:
Author: Niall Litchfield

Fat City Network Services    -- 858-538-5051
San Diego, California        -- Mailing list and web hosting services
To REMOVE yourself from this mailing list, send an E-Mail message
to: (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).
Received on Mon Nov 24 2003 - 15:54:31 CST

Original text of this message