题目
Which two statements about the background process of thedatabase writerare true()
AIt is possible to have multiple database writers in an Oracle instance.
BIt writes dirty buffers, if any, to data files whenever a checkpoint occurs.
CIt writes dirty buffers, if any, to data files whenever a transaction commits.
DIt writes dirty buffers, if any, to data files before the log writer (LGWR) writes.
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