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全部博文（487）
发布时间：2019-08-08 11:43:39
A)a bigfile tablespaceC)a segmentE)an extent......【阅读全文】
发布时间：2019-08-07 11:15:59
A)They might be used during instance recovery.C)They are always used during instance recovery.E)They are always used during media recovery.G)They might be used during media recovery.赵：E 错，不是一直。只有在数据文件损坏、在线日志文件损坏等情况发生时，才用介质恢复。.........【阅读全文】
发布时间：2019-08-07 10:32:52
A)They archive redo directly from the redo log buffer.C)They automatically delete obsolete archive logs to make space for new archive logs.E)They create archivelogs after every log switch.赵：对于 A 选项， ARCn 进程归档的是在线 Redo 日志文件，不是 redo log buffer 。对于 C 选项.........【阅读全文】
发布时间：2019-08-05 11:27:14
A)LGWR always writes to the redo logs each time a COMMIT occurs.C)LGWR never writes a single COMMIT to the redo logs.E)Multiple COMMITs can be written by LGWR in the same write request.Answer: DE冉：E 答案给的是 group commit 的概念，即在 lgwr 正在执行时，其他会话发生的 commit .........【阅读全文】
发布时间：2019-08-05 10:16:16
A)after undo is applied by PMON during process recoveryC)when the password file is updatedE)when flashback logs are updated赵：made to 发到......【阅读全文】
