RE: Changing DB_CACHE_SIZE to DB_BLOCK_BUFFERS
- From: "Herring Dave - dherri" <Dave.Herring@xxxxxxxxxx>
- To: "Christian Antognini" <Christian.Antognini@xxxxxxxxxxxx>
- Date: Sun, 3 Sep 2006 16:09:37 -0500
I went through those hoops below because I incorrectly thought I had to
provide the sid value (never thought to try asterisk):
alter system reset sort_area_size scope = spfile sid = '...'
*
ERROR at line 1:
ORA-32010: cannot find entry to delete in SPFILE
Not sure what I'm missing, but at least I now know '*' works and will
definitely share that info!! Thanks Chris!
Dave
-------------------------------------
Dave Herring, DBA
Acxiom Corporation
3333 Finley
Downers Grove, IL 60515
wk: 630.944.4762
<mailto:dherri@xxxxxxxxxx>
-------------------------------------
"When I come home from work and see those little noses pressed against
the windowpane, then I know I am a success" - Paul Faulkner
> -----Original Message-----
> From: Christian Antognini [mailto:Christian.Antognini@xxxxxxxxxxxx]
> Sent: Sunday, September 03, 2006 2:33 PM
> To: Herring Dave - dherri
> Cc: oracle-l@xxxxxxxxxxxxx
> Subject: RE: Changing DB_CACHE_SIZE to DB_BLOCK_BUFFERS
>
> Dave
>
> > What would be the best way to do this in a non-RAC env? All that I
> > can figure is:
> >
> > ALTER SYSTEM RESET db_cache_size SCOPE = memory SID = '<sid>';
> > /* Since SCOPE = spfile doesn't work in a non-RAC env as the sid
> > value isn't * included within the spfile. */
>
> There is no difference between RAC and non-RAC environment. The part
> about the SID is always available. If nothing is specified, which is
> common in non-RAC environment, the character "*" is used instead. In a
> RAC environment the character "*" is used for most parameters as well.
> In fact you use the SID only for those parameters that must be
instance
> specific.
>
> Therefore to remove a parameter for a single instance, or from
multiple
> instances with RAC, you can use the following statement.
>
> ALTER SYSTEM RESET <parameter> SCOPE=spfile SID='*'
>
> > CREATE pfile FROM spfile;
> > /* to make sure any other changes get saved in the pfile, since
> > that'll be * used on next instance startup. */
> >
> > Then remember to delete line 'db_cache_size = ...' from the pfile
> > before
> > the next instance bounce, then startup the instance using the pfile.
> >
> > CREATE spfile FROM pfile;
> > /* so that the spfile is now current with pfile changes. */
>
> i.e. it's not reason to do it in this way...
>
>
> HTH
> Chris
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