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单项选择题

YouaremaintainingyourOLTPdatabaseinOracle10g.Whileobservingtheperformanceofthedatabase,youfindthatthelogswitchoccursmorethanonceforevery20minutes,affectingthedatabaseperformance.Whichfactorisresponsibleforfrequentlogswitches?()
A.thevalueoftheUNDO_RETENTIONinitializationparameter
B.thevalueoftheoptimalredologfilesizeprovidedbytheRedoLogfileSizeAdvisor
C.theonlineredologfilessize
D.thenumberofredologmembersinagroup

    A.Whileobservingtheperformanceofthedatabase,youfindthatthelogswitchoccursmorethanonceforevery20minutes,affectingthedatabaseperformance.Whichfactorisresponsibleforfrequentlogswitches?()
    A.thevalueoftheUNDO_RETENTIONinitializationparameter
    B.thevalueoftheoptimalredologfilesizeprovidedbytheRedoLogfileSizeAdvisor
    C.theonlineredologfilessize
    D.thenumberofredologmembersinagroup
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