oracle参数文件
欢迎进入Oracle社区论坛，与200万技术人员互动交流 >>进入 参数文件的相关问题。 一、查看数据库中参数值的方法 1、查看initsid.ora文件。 不提供所有参数；参数可能已经更改，文件中的参数值不是最新值(新值可能在spfile中，而initsid.ora文件中没有更新)。
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参数文件的相关问题。
一、查看数据库中参数值的方法
1、查看initsid.ora文件。
不提供所有参数；参数可能已经更改，文件中的参数值不是最新值(新值可能在spfile中，而initsid.ora文件中没有更新)。
2、查询视图V$PARAMETER。
可利用它来确定参数的默认值是否修改过，以及是否可以用alter system和alter session命令修改。
应该特别注意ISMODIFIED、ISDEFAULT、ISADJUSTED、ISSYS＿MODIFIABLE、ISSES＿MODIFIABLE列中的值。
3、使用SQL*Plus的show parameter。
二、设置参数的方法
1、修改initsid.ora文件。
可以修改所有的参数，必须关闭并重启实例才能生效。
2、使用alter system、alter system deferred和alter session命令。
不能修改所有参数，修改后可立即生效，并可保存到spfile或init文件中。
三、缺省情况下，Oracle9i启动时读取参数文件的顺序
重新启动数据库，使用startup命令，Oralce将会按照以下顺序在缺省目录中搜索参数文件：
a. spfile$.ora
缺省目录 UNIX: $/dbs/
NT: $/database
b. spfile.ora
缺省目录 UNIX: $/dbs/
NT: $/database
c. init$.ora
缺省目录 UNIX: $/dbs/
NT: $/database
or $/admin/db_name/pfile/
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