Hi all, I could figure out the issue, The problem was due to maximum number of processes exceeded and for any new session it was not allowing. I am increasing the session parameter and bounce when the downtime arises. Thanks, Ann On Jan 3, 2008 2:49 AM, Shastry(DBA) <shastry17@xxxxxxxxx> wrote: > Hi all, > > For sometime my production database was not letting me to do any > operations: > > I found these alerts > SQL> select name from v$database; > select name from v$database > * > ERROR at line 1: > ORA-01012: not logged on > > > SQL> select * from dba_users; > select * from dba_users > * > ERROR at line 1: > ORA-01012: not logged on > > But I could see the ora_ processes were running and even TNS was up and > running. > > After sometime..I tried it again and is working fine. Is this a bug, Can > anyone tell me if you have faced the same problem. The SQL*Plus Release is > 9.2.0.4.0. > > Thanks, > Ananth