Oracle用户被锁的原因以及解决办法
在登陆时被告知test用户被锁1、用dba角色的用户登陆，进行解锁，先设置具体时间格式，以便查看具体时间
[*]SQL> alter session set nls_date_format='yyyy-mm-dd hh24:mi:ss';
[*]Session altered.
2、查看具体的被锁时间
[*]SQL> select username,lock_date from dba_users where username='TEST';
[*]USERNAME LOCK_DATE
[*]TEST 2012-07-10 12:04:27
3、解锁
[*]SQL> alter user test account unlock;
[*]User altered.
4、查看是那个ip造成的test用户被锁
[*]$ lsnrctl status
[*]
[*]LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 16-JUL-2012 21:11:17
[*]
[*]Copyright (c) 1991, 2009, Oracle.All rights reserved.
[*]
[*]Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=hzwebdb11g.qa.webex.com)(PORT=1521)))
[*]STATUS of the LISTENER
[*]------------------------
[*]Alias LISTENER
[*]Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production
[*]Start Date 15-MAY-2012 15:24:17
[*]Uptime 62 days 5 hr. 47 min. 0 sec
[*]Trace Level off
[*]Security ON: Local OS Authentication
[*]SNMP OFF
[*]Listener Parameter File /home/oracle/OraBase/OraHome1/network/admin/listener.ora
[*]Listener Log File /home/oracle/OraBase/diag/tnslsnr/hzwebdb11g/listener/alert/log.xml
查看/home/oracle/OraBase/diag/tnslsnr/hzwebdb11g/listener/alert/log.xml 日志
[*]
[*] 10-JUL-2012 12:04:27 * (CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=qawebdb.qa.webex.com)(FAILOVER_MODE=(TYPE=SELECT)(METHOD=BASIC)(RETRIES=180)(DELAY=5))(CID=(PROGRAM=wbxmcs-01)(HOST=gm02lnmcs1001)(USER=root))) * (ADDRESS=(PROTOCOL=tcp)(HOST=10.224.182.161)(PORT=50034)) * establish * qawebdb.qa.webex.com * 0
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发现10.224.182.161这个IP连接数据库失败锁住数据库，改掉这个server的密码
一般数据库默认是10次尝试失败后锁住用户
1、查看FAILED_LOGIN_ATTEMPTS的值
[*]select * from dba_profiles
2、修改为30次
[*]alter profile default limit FAILED_LOGIN_ATTEMPTS 30;
3、修改为无限次（为安全起见，不建议使用）
[*]alter profile default limit FAILED_LOGIN_ATTEMPTS unlimited;
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