自动内存管理与statistics_level
Automatic Shared Memory Management simplifies the configuration of the SGA. To use Automatic Shared Memory Management, set the SGA_TARGET initialization parameter to a nonzero value and set the STATISTICS_LEVEL initialization parameter to TYPICAL or ALL.
1sys@HUA>alter system set statistics_level=basic2 2 ;3alter system set statistics_level=basic4*5ERROR at line 1:6ORA-02097: parameter cannot be modified because specified value is invalid7ORA-00830: cannot set statistics_level to BASICoracle账号 with auto-tune SGA enabled