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SORT_AREA SIZE and HASH_AREA_SIZE parameters are ignored in some of the user sessions. What could be the reason？（）
A:The User Global Area （UGA） is not configured.
B:The sessions were started using the login name SYS.
C:The sessions are running in the Automatic Shared Memory Management mode.
D:The sessions are running in the automatic Program Global Area （PGA） memory management mode.

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出自：Oracle认证

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