单选题Which Oracle background process frees SGA resources that were allocated to a user process that failed？（）APMONBSMONCCKPTDLGWREARCn
单选题
Which Oracle background process frees SGA resources that were allocated to a user process that failed？（）
A
PMON
B
SMON
C
CKPT
D
LGWR
E
ARCn
参考解析
解析：
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