Initialization parameter will not remain

Facing a problem of stange for the first time. Anyone have any ideas on what could be the cause?

DB - 10.2.0.4, Windows Server 2008

Current setting for the optimizercost_based_transformation = OFF. We want to put it on YOU.
The following command is question:

change the system '_optimizer_cost_based_transformation' scope = all = both;

The database is bounced and here is the result:

SQL > conn sys@uimdev as sysdba
Enter password: *.
Connected.

SQL > change the system '_optimizer_cost_based_transformation' scope = all = spfile;

Modified system.

SQL > shutdown immediate
The database is closed.
The database is dismounted.
ORACLE instance stops.

SQL > startup
ORACLE instance started.


Total System Global Area 5251268608 bytes
Bytes of size 2073080 fixed
1577061896 variable size bytes
3657433088 of database buffers bytes
Redo buffers 14700544 bytes
Mounted database.
Open database.

SQL > show parameter _optimizer

VALUE OF TYPE NAME
------------------------------------ ----------- ------------------------------
optimizer ofchain of cost_based_transformation ON

Here'S THE PROBLEM:
During any other opening, the values of the parameters show a value AGAIN. For example:

SQL > select name, value of the parameter $ v where name like '% _opt;

VALUE NAME
------------------------------------- ---------
optimizer OFF cost_based_transformation

Someone at - he seen this type of behavior or knows how to solve?

Thaks in advance for the help...

By default at startup, it should read spfile. Have you tried SCOPE = BOTH;

 alter system set "_optimizer_cost_based_transformation"=on scope=spfile;

KDSDBA
OCP

Tags: Database

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