Whichtwostatementsaboutthebackgroundprocessofthedatabasewriteraretrue()

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A.ItispossibletohavemultipledatabasewritersinanOracleinstance.

B.Itwritesdirtybuffers,ifany,todatafileswheneveracheckpointoccurs.

C.Itwritesdirtybuffers,ifany,todatafileswheneveratransactioncommits.

D.Itwritesdirtybuffers,ifany,todatafilesbeforethelogwriter(LGWR)writes

参考答案:

参考A, B

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