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判断是否使用了spfile

2007-01-04 11:16:01| 分类： Oracle | 标签： |举报 |字号大中小订阅

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判断是否使用了SPFILE，可以使用以下方法：

1．查询v$parameter动态视图，如果以下查询返回空值，那么你在使用pfile.

SQL> SELECT name,value FROM v$parameter WHERE ;

NAME VALUE

------------ ---------------------------------

spfile %ORACLE_HOME%\DATABASE\SPFILE%ORACLE_SID%.ORA

2．或者你可以使用SHOW命令来显示参数设置，如果以下结果value列返回空值，那么说明你在使用pfile:

SQL> SHOW PARAMETER spfile

NAME TYPE VALUE

------------------------- ------ ---------------

spfile string %ORACLE_HOME%\DATABASE\SPFILE%ORACLE_SID%.ORA

3．查询v$spparameter视图

如果以下查询返回0值，表示你在使用pfile,否则表明你使用的是spfile:

SQL> SELECT COUNT(*) FROM v$spparameter WHERE value IS NOT NULL;

COUNT(*)

----------

32

或者使用以下查询，如果true值返回非0值，那么说明我们使用的是spfile.

SQL> SELECT isspecified, COUNT (*) FROM v$spparameter

2 GROUP BY isspecified;

ISSPECIFIED COUNT(*)

------------ ----------

FALSE 226

TRUE 33

更为直接的：

SQL> select decode(count(*), 1, 'spfile', 'pfile' ) USED

2 from v$spparameter

3 where rownum=1 and isspecified='TRUE'

4 /

USED

------------

spfile

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