oracle profile 登录失败次数

SQL> create profile log5 limit FAILED_LOGIN_ATTEMPTS 5;
Profile created.
SQL> alter user anbob profile log5;
User altered.
SQL> conn anbob/asd
ERROR:
ORA-01017: invalid username/password; logon denied
Warning: You are no longer connected to ORACLE.
SQL> conn anbob/asd
ERROR:
ORA-01017: invalid username/password; logon denied
SQL> conn anbob/asd
ERROR:
ORA-01017: invalid username/password; logon denied
SQL> conn anbob/asd
ERROR:
ORA-01017: invalid username/password; logon denied
SQL> conn anbob/asd
ERROR:
ORA-01017: invalid username/password; logon denied
SQL> conn anbob/asd
ERROR:
ORA-28000: the account is locked
SQL> conn system/oracle
Connected.
SQL> alter user anbob account unlock;
User altered.
 ALTER PROFILE
 -------------
 Use this command to add, modify, or remove a resource limit or
 password management in a profile.
 ALTER PROFILE profile LIMIT
   { { SESSIONS_PER_USER
     | CPU_PER_SESSION
     | CPU_PER_CALL
     | CONNECT_TIME
     | IDLE_TIME
     | LOGICAL_READS_PER_SESSION
     | LOGICAL_READS_PER_CALL
     | COMPOSITE_LIMIT}
        {integer | UNLIMITED | DEFAULT}
   | { PRIVATE_SGA { integer [K | M]
                   | UNLIMITED
                   | DEFAULT}
   | FAILED_LOGIN_ATTEMPTS
   | PASSWORD_LIFETIME
   | {PASSWORD_REUSE_TIME
     |PASSWORD_REUSE_MAX}
   | ACCOUNT_LOCK_TIME
   | PASSWORD_GRACE_TIME}
       {integer | UNLIMITED | DEFAULT}
   | PASSWORD_VERIFY_FUNCTION
       {function | NULL | DEFAULT} } ...
 For detailed information on this command, see the Oracle8 Server SQL
 Reference.
SQL> alter profile log5 limit failed_login_attempts 3;
Profile altered.
SQL> conn anbob/dd
ERROR:
ORA-01017: invalid username/password; logon denied
Warning: You are no longer connected to ORACLE.
SQL> conn anbob/dd
ERROR:
ORA-01017: invalid username/password; logon denied
SQL> conn anbob/dd
ERROR:
ORA-01017: invalid username/password; logon denied
SQL> conn anbob/dd
ERROR:
ORA-28000: the account is locked
SQL> alter profile log5 limit failed_login_attempts unlimited;
SP2-0640: Not connected
SQL> conn system/oracle
Connected.
SQL> alter profile log5 limit failed_login_attempts unlimited;
Profile altered.
SQL> 
老用法不多解释