单项选择题
One of the tablespaces is read-only in your database. The loss of all control files forced you to re-create the control file. Which operation do you need to perform after re-creating the control file and opening the database?()
A. drop and re-create the read-only tablespaces
B. rename the read-only data files to their correct file names
C. change the tablespace status from read/write to read-only
D. re-create the read-only tablespace because it is automatically removed
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单项选择题
Youobservethatadatabaseperformancehasdegradedoveraperiodoftime.Whileinvestigatingthereason,youfindthatthesizeofthedatabasebuffercacheisnotlargeenoughtocachealltheneededdatablocks.Whichadvisorycomponentwouldyoureferto,inordertodeterminethatrequiredsizeofthedatabasebuffercache?()
A. Memory Advisor
B. Segment Advisor
C. SQL Tuning Advisor
D. SQL Access Advisor
E. Automatic Database Diagnostic Monitor (ADDM)
