Instance dead.. by os?

Question

Hi all,
this night one db has shutted down unexpectedly.
This is what i got from trace:
*** SERVICE NAME:(SYS$BACKGROUND) 2007-06-15 02:00:38.058
*** SESSION ID:(325.1) 2007-06-15 02:00:38.058
error 4030 detected in background process
OPIRIP: Uncaught error 447. Error stack:
ORA-00447: fatal error in background process
ORA-04030: out of process memory when trying to allocate bytes (,)
and from alert:
Errors in file d:\oracle\product\10.1.0\admin\hubpdb\bdump\hubpdb_ckpt_6560.trc:
ORA-04030: Message 4030 not found; No message file for product=RDBMS, facility=ORA; arguments: [16908] [pga heap] [Get krha asynch mem]
Fri Jun 15 02:00:22 2007
CKPT: terminating instance due to error 4030
Version 10.1.0.4 on win 2003sp1 (i swear.. not my fault!)
At that hours rman was backing up the db.
I think that the machine run out of memory and os tried to "stole" it from db.
So oracle prevent data corruption by shutting down the instance.
Any ideas?
ps..
Actually everythings seem to be ok. I just wish to avoid this situation again..
Thanks
Acr

Answer 1

Version 10.1.0.4 on win 2003sp1 (i swear.. not my fault!)Is this a 32-bit system?
If yes i think you have a problem with the 2GB (or 3GB) limit. If i am right, you don't have any chance on windows (because of the implementation with threads!).
You can use the following query to determine the usage of memory (without process stack and code size):
select sum(bytes)/1024/1024 MB from
(select bytes from v$sgastat
union
select value bytes from
v$sesstat s,
v$statname n
where
n.STATISTIC# = s.STATISTIC# and
n.name = 'session pga memory'
Regards
Stefan