Hi to all Oracle Optimizers

I have a problem with increasing of SGA_MAX_SIZE parameter.

Sub issue 1:

I am trying to increase a SGA_MAX_SIZE parameter making the change in spfile.ora but after starting the instance the following Oracle error message appeared:

//connect to and shutdown the instance

SQL> connect sys /* as sysdba;
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.

//modify spfile.ora as changed the sga_max_size parameter
//startup the instance

>SQL startup;
ORA-00600: internal error code, arguments: [733], [538970672], [pga heap], [], [], [], [], []

Firstly, I increased the parameter with 300MB more and after that with 1byte only BUT the message still remains.

Sub issue 2:

The value of sga_max_size in spfile is different from the value of the same parameter via OEM and via cmd prompt:

/in spfile/:
*.sga_max_size=943718400 bytes

/in OEM/:
sga_max_size=1158751172 bytes

/via cmd/:

>SQL show sga;

Total System Global Area 1158751172 bytes
Fixed Size 55620 bytes
Variable Size 671088640 bytes
Database Buffers 486539264 bytes
Redo Buffers 667648 bytes

Can anybody help me?

Thanks in advance