连接数据库的时候报：ORA-09817:write to audit file，在网上搜索了下，发现时oracle安装目录下面的磁盘空间不够，有不少人给出了解决办法，下面即是一例：
连接oracle 报错：ORA-09817: Write to audit file failed.
[oracle@qs-dmm-rh1 dave]$ sqlplus sys/oracle as sysdba;
SQL*Plus: Release 10.2.0.4.0 - Production on Thu Mar 17 16:35:02 2011
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
ERROR:
ORA-09817: Write to audit file failed.
--这种错误基本是磁盘空间满了
Enter user-name:
ERROR:
ORA-01017: invalid username/password; logon denied
Enter user-name:
ERROR:
ORA-01017: invalid username/password; logon denied
SP2-0157: unable to CONNECT to ORACLE after 3 attempts, exiting SQL*Plus
[oracle@qs-dmm-rh1 dave]$ oerr ora 9817
09817, 00000, "Write to audit file failed."
// *Cause: ORACLE was unable to write an entry to the file used as the
// audit trail.
// *Action: Check the UNIX error number for a possible operating system error.
// If there is no error, contact Oracle Support Services.
[oracle@qs-dmm-rh1 dave]$ df -lh
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 13G 12G 136K 100% /
/dev/sda1 99M 12M 83M 12% /boot
tmpfs 506M 0 506M 0% /dev/shm
[oracle@qs-dmm-rh1 dave]$
删除部分文件后：
[oracle@qs-dmm-rh1 u01]$ df -lh
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 13G 9.1G 2.8G 77% /
/dev/sda1 99M 12M 83M 12% /boot
tmpfs 506M 0 506M 0% /dev/shm
再次连接正常：
[oracle@qs-dmm-rh1 u01]$ sqlplus / as sysdba;
SQL*Plus: Release 10.2.0.4.0 - Production on Thu Mar 17 17:06:43 2011
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
我自己删除的文件是：/oraapp/oracle/product/11.2.0/dbhome_1/dbs
原文地址：http://blog.163.com/yanenshun@126/blog/static/128388169201261193117492/