Interesting problem with oracle on linux

Hi ,

I have oracle : Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production
and linux RH9 with kernel version 2.4.20-8 .

Usualy everything is o.k. but sometimes ( one per week ) system pass to state decripted below :

1. I can't log into oracle . When I try to do it .. I'em waiting long time and nothing happen.
2. OS. Linux seems to be fine . But on TOP command Oracle processess is inactive.
3. In alert file i have found decriptions :

   Thu Jan 29 17:24:31 2004
Errors in file /u01/app/oracle/admin/SMSC/bdump/smsc_j022_28788.trc: ORA-00600: kod błędu wewnętrznego, argumenty: [510],
[0x50042930], [shared pool], [], [], [], [], []
Thu Jan 29 17:24:33 2004
Errors in file /u01/app/oracle/admin/SMSC/bdump/smsc_j022_28788.trc: ORA-07445: napotkano wyj?tek: zrzut pamięci [kdbmal()+27]
[SIGSEGV] [Address not mapped to object] [0x38] [] []
ORA-00600: kod błędu wewnętrznego, argumenty: [510],
[0x50042930], [shared pool], [], [], [], [], []
Thu Jan 29 17:24:33 2004
Errors in file /u01/app/oracle/admin/SMSC/bdump/smsc_j022_28788.trc: ORA-07445: napotkano wyj?tek: zrzut pamięci [kdbmal()+27]
[SIGSEGV] [Address not mapped to object] [0x38] [] []
ORA-07445: napotkano wyj?tek: zrzut pamięci [kdbmal()+27]
[SIGSEGV] [Address not mapped to object] [0x38] [] []
ORA-00600: kod błędu wewnętrznego, argumenty: [510],
[0x50042930], [shared pool], [], [], [], [], []
Thu Jan 29 17:24:34 2004
Errors in file /u01/app/oracle/admin/SMSC/bdump/smsc_j022_28788.trc: ORA-07445: napotkano wyj?tek: zrzut pamięci [kdbmal()+27]
[SIGSEGV] [Address not mapped to object] [0x38] [] []
ORA-07445: napotkano wyj?tek: zrzut pamięci [kdbmal()+27]
[SIGSEGV] [Address not mapped to object] [0x38] [] []
ORA-07445: napotkano wyj?tek: zrzut pamięci [kdbmal()+27]
[SIGSEGV] [Address not mapped to object] [0x38] [] []
ORA-00600: kod błędu wewnętrznego, argumenty: [510],
[0x50042930], [shared pool], [], [], [], [], []

or another description is :

PMON failed to acquire latch, see PMON dump

in PMON dump is :

PMON unable to acquire latch 584c1d40 library cache   possible holder pid = 98 ospid=1748
*** 2004-03-15 12:54:51.989
PMON unable to acquire latch 584c1d40 library cache   possible holder pid = 98 ospid=1748
*** 2004-03-15 12:54:52.290

I assume that it is lock on memory .. but I not sure .

Any
suggestion will be welcome.

With thanks,
Artur from Poland Received on Thu Mar 18 2004 - 12:06:27 CET