如何关闭Oracle11g数据库的审计功能？

在oracle11g中，数据库的审计功能是默认开启的（这和oracle10g的不一样，10g默认是关闭的），\x0d\x0aoracle11gR2的官方文档上写的是错的，当上说default是none，而且是审计到DB级别的，这样就会\x0d\x0a往aud$表里记录统计信息。\x0d\x0a \x0d\x0a1.如果审计不是必须的，可以关掉审计功能；\x0d\x0a\x0d\x0aSQL>show parameter audit_trail\x0d\x0a\x0d\x0aNAME TYPEVALUE\x0d\x0a------------------------------------ ----------- ------------------------------\x0d\x0aaudit_trail string DB\x0d\x0a\x0d\x0aSQL>alter system set audit_trail=none scope=spfile\x0d\x0aSQL>shut immediate\x0d\x0aSQL>startup\x0d\x0a2.删除已有的审计信息\x0d\x0a可以直接truncate表aud$,\x0d\x0atruncate table SYS.AUD$\x0d\x0a\x0d\x0a3.或者将aud$表移到另外一个表空间下，以减少system表空间的压力和被撑爆的风险。\x0d\x0a \x0d\x0a附：11g中有关audit_trail参数的设置说明：\x0d\x0aAUDIT_TRAIL\x0d\x0aProperty Description\x0d\x0aParameter type String\x0d\x0aSyntaxAUDIT_TRAIL = { none | os | db [, extended] | xml [, extended] }\x0d\x0aDefault valuenone\x0d\x0aModifiable No\x0d\x0aBasic No\x0d\x0aAUDIT_TRAIL enables or disables database auditing.\x0d\x0aValues:\x0d\x0anone\x0d\x0aDisables standard auditing. This value is the default if the AUDIT_TRAIL parameter was not set \x0d\x0ain the initialization parameter file or if you created the database using a method other than \x0d\x0aDatabase Configuration Assistant. If you created the database using Database Configuration \x0d\x0aAssistant, then the default is db.\x0d\x0aos\x0d\x0aDirects all audit records to an operating system file. Oracle recommends that you use the os \x0d\x0asetting, particularly if you are using an ultra-secure database configuration.\x0d\x0adb\x0d\x0aDirects audit records to the database audit trail (the SYS.AUD$ table), except for records \x0d\x0athat are always written to the operating system audit trail. Use this setting for a general \x0d\x0adatabase for manageability.\x0d\x0aIf the database was started in read-only mode with AUDIT_TRAIL set to db, then Oracle Database \x0d\x0ainternally sets AUDIT_TRAIL to os. Check the alert log for details.\x0d\x0adb, extended\x0d\x0aPerforms all actions of AUDIT_TRAIL=db, and also populates the SQL bind and SQL text CLOB-type \x0d\x0acolumns of the SYS.AUD$ table, when available. These two columns are populated only when this \x0d\x0aparameter is specified.\x0d\x0aIf the database was started in read-only mode with AUDIT_TRAIL set to db, extended, then Oracle \x0d\x0aDatabase internally sets AUDIT_TRAIL to os. Check the alert log for details.\x0d\x0axml\x0d\x0aWrites to the operating system audit record file in XML format. Records all elements of the \x0d\x0aAuditRecord node except Sql_Text and Sql_Bind to the operating system XML audit file.\x0d\x0axml, extended\x0d\x0aPerforms all actions of AUDIT_TRAIL=xml, and populates the SQL bind and SQL text CLOB-type columns\x0d\x0a of the SYS.AUD$ table, wherever possible. These columns are populated only when this parameter \x0d\x0ais specified.\x0d\x0aYou can use the SQL AUDIT statement to set auditing options regardless of the setting of this \x0d\x0aparameter.

Oracle 11g比起Oracle 10g来要好卸载很多，基本步骤如下：

客户端卸载：

1、停用oracle服务：进入计算机管理，在服务中，找到oracle开头的所有服务，右击选择停止。

2、在开始菜单中，oracle目录下，找到Universal Installer；

点击Universal Installer，单击卸载产品；

3、在产品清单窗口中，单击全部展开，勾选所有项目，单击删除；

4、如果d出提示框，按照提示框一步步卸载就行。

服务端端卸载：

1、做到上面第3步时，在产品清单窗口中，单击全部展开，除了OraDb11g_home1外，勾选其他项目，单击删除；

2、按Windows徽标键和R键，打开运行窗口，输入regedit，打开注册表，依次展开HKEY_LOCAL_MACHINE\SOFTWARE，找到oracle，删除；

3、依次展开HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services中，删除所有oracle开头的项；

4、依次展开HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\Application，删除所有oracle开头的项；在HKEY_CLASSES_ROOT，删除以ora开头的项；

5、 重启电脑，删除oracle目录，删除Oracle的安装目录app等；

6、我的电脑-->属性-->高级-->环境变量,删除环境变量CLASSPATH和PATH中有关Oracle的设定。

步骤如下

关闭oracle所有的服务。可以在windows的服务管理器中关闭。

打开注册表：regedit 打开路径：HKEY_LOCAL_MACHINE\SYSTEM\CurrentCon

打开注册表，找到路径：HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE

删除注册的oracle事件日志，打开注册表。

删除环境变量path中关于oracle的内容。

重新启动 *** 作系统。

如果不删除开始菜单下的Oracle相关菜单目录，没关系，这个不影响再次安装Oracle.当再次安装Oracle时，该菜单会被替换。

---