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You have included the following parameter setting in your server parameter file：       PGA_AGGREGATE_TARGET = 800M        SORT_AREA_SIZE = 100M        HASH_AREA_SIZE = 100M        BITMAP_MERGE_AREA_SIZE = 100M        CREATE_BITMAP_AREA_SIZE = 100M   Which statement is true？（）  
A: All the *_AREA_SIZE parameters are ignored.
B: The Automatic PGA Memory Management feature cannot be disabled.
C: The total Program Global Area （PGA） memory cannot be manually increased above 800M.
D: The total memory for the PGA can automatically exceed 800M using the Automatic PGA Memory Management feature.

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出自：Oracle认证

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