Oracle数据库启动过程的几个阶段(SHUTDOWN -> NOMOUNT -> MOUNT -> OPEN)

Oracle数据库启动过程的几个阶段：SHUTDOWN -> NOMOUNT -> MOUNT -> OPEN

1.shutdown immediate

SQL> startupORACLE instance started. Total System Global Area  251658240 bytesFixed Size                   788368 bytesVariable Size             145750128 bytesDatabase Buffers          104857600 bytesRedo Buffers                 262144 bytesDatabase mounted.Database opened.

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