Oracle: Add more memory for SGA and PGA

Environment:
- Oracle 10g
- Windows Server x64

By the default, when create database, can specify SGA and PGA not more than 2 GB (I tried at 3 GB and it's OK). To increase more, need to modify in Server Parameter File (spfile) which locate in folder '%ORACLE_HOME%\admin\\pfile\init.ora.*'.
Modify these parameters:
- sga_target
- pga_aggregate_target

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