If I understand correctly that's where the error is reported. As well as high load, memory shortage and disk driver issues can both cause this sort of problem. You say that you immediately get a 3113 when trying to restart which may well point the finger at memory. Are you positive that it's a 64bit system? Niall On Mon, Nov 9, 2009 at 4:57 PM, Jared Still <jkstill@xxxxxxxxx> wrote: > > > On Sun, Nov 8, 2009 at 11:27 PM, Asif Momen <asif_oracle@xxxxxxxxx>wrote: > >> When the crash happens, nothing is written to the alert.log nor to any >> files in udump and cdump. Even if I copy last lines or attach the alert.log, >> you will find it useless as no info is written to it. The last line is about >> a log switch. >> >> > Have you examined the event logs? > > > Jared Still > Certifiable Oracle DBA and Part Time Perl Evangelist > Oracle Blog: http://jkstill.blogspot.com > Home Page: http://jaredstill.com > > -- Niall Litchfield Oracle DBA http://www.orawin.info