不知道爲什麼最近在使用的一個數據庫總是在一段時間後被鎖住。
google一下，問題好像是用錯誤的密碼登錄超過10次就會導致賬戶自動被鎖。
解決的根本方法是找到是哪裏在使用錯誤密碼不斷嘗試登錄
但是如果你一時之間找不到問題根本：
可以採取如下方法：
1.使用dba賬戶登錄：
Login as SYSDBA
SQL> conn /as sysdba
2.檢查賬戶的狀態
Check the APPSUSR account status.
SQL> SELECT username, account_status FROM dba_users WHERE username= ‘APPUSR';
USERNAME ACCOUNT_STATUS PROFILE
-------------------- -------------------- ---------------
APPUSR LOCKED(TIMED) DEFAULT
檢查Default profile的資源限制
Check the resource limits of DEFAULT profile.
SQL> SELECT resource_name,resource_type,limit FROM dba_profiles WHERE profile='DEFAULT';
RESOURCE_NAME RESOURCE LIMIT
-------------------------------- -------- ----------
COMPOSITE_LIMIT KERNEL UNLIMITED
SESSIONS_PER_USER KERNEL UNLIMITED
CPU_PER_SESSION KERNEL UNLIMITED
CPU_PER_CALL KERNEL UNLIMITED
LOGICAL_READS_PER_SESSION KERNEL UNLIMITED
LOGICAL_READS_PER_CALL KERNEL UNLIMITED
IDLE_TIME KERNEL UNLIMITED
CONNECT_TIME KERNEL UNLIMITED
PRIVATE_SGA KERNEL UNLIMITED
FAILED_LOGIN_ATTEMPTS PASSWORD 10
PASSWORD_LIFE_TIME PASSWORD UNLIMITED
PASSWORD_REUSE_TIME PASSWORD UNLIMITED
PASSWORD_REUSE_MAX PASSWORD UNLIMITED
PASSWORD_VERIFY_FUNCTION PASSWORD NULL
PASSWORD_LOCK_TIME PASSWORD UNLIMITED
PASSWORD_GRACE_TIME PASSWORD UNLIMITED
這裏不建議直接修改Default profile，最好創建一個新的profile
Create a profile.
SQL> CREATE PROFILE APPUSR_DEFAULT LIMIT
2 COMPOSITE_LIMIT UNLIMITED
3 SESSIONS_PER_USER UNLIMITED
4 CPU_PER_SESSION UNLIMITED
5 CPU_PER_CALL UNLIMITED
6 LOGICAL_READS_PER_SESSION UNLIMITED
7 LOGICAL_READS_PER_CALL UNLIMITED
8 IDLE_TIME UNLIMITED
9 CONNECT_TIME UNLIMITED
10 PRIVATE_SGA UNLIMITED
11 FAILED_LOGIN_ATTEMPTS UNLIMITED
12 PASSWORD_LIFE_TIME UNLIMITED
13 PASSWORD_REUSE_TIME UNLIMITED
14 PASSWORD_REUSE_MAX UNLIMITED
15 PASSWORD_VERIFY_FUNCTION NULL
16 PASSWORD_LOCK_TIME UNLIMITED
17 PASSWORD_GRACE_TIME UNLIMITED;
Profile created.
將新的proflie設置爲默認的profile
Assign the newly created profile to the user as default profile.
SQL> ALTER USER appusr PROFILE appusr_default;
User altered.
解鎖賬戶
Unlock the user account:
SQL> ALTER USER appusr ACCOUNT UNLOCK;
User altered.
重新檢查賬戶狀態
Now check again the status of APPUSR user.
SQL> SELECT username, account_status FROM dba_users WHERE username= ‘APPUSR';
USERNAME ACCOUNT_STATUS PROFILE
-------------------- -------------------- ---------------
APPUSR OPEN APPUSR_DEFAULT
至此，問題解決。