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以pfile或者spfile启动时show parameter pfile的不同结果

普通启动:
SQL> show parameter pfileNAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
spfile                               string      /u01/app/oracle/product/11.2.0/dbhome_1/dbs/spfilesingle1.or a以pfile启动
SQL> startup nomount pfile=/home/oracle/pfile.ora
ORACLE instance started.Total System Global Area  413372416 bytes
Fixed Size                  2253784 bytes
Variable Size             314575912 bytes
Database Buffers           92274688 bytes
Redo Buffers                4268032 bytesSQL> alter database mount;Database altered.SQL> alter database open;Database altered.SQL>    show parameter pfile;NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
spfile                               string
SQL>that's the difference. 

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