What patch level are you on? We get those also but they don't shutdown our DB...This is a DW DB and the issue is a bug with star transformations.... ksedmp: internal or fatal error ORA-07445: exception encountered: core dump [memcpy()+136] [SIGSEGV] [unknown code] [0x800003FAC0080 000] [] [] Thanks!=20 -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Schauss, Peter Sent: Thursday, May 19, 2005 12:55 PM To: cmarquez@xxxxxxxxxxxxxxxx; oracle-l@xxxxxxxxxxxxx Subject: RE: ORA-07445, "SIGSEGV", & "address"??? Chris, This usually means that some piece of code committed a bounds violation, trying to read from or write to memory which it did not own. HTH, Peter Schauss -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Marquez, Chris Sent: Thursday, May 19, 2005 11:39 AM To: oracle-l@xxxxxxxxxxxxx Subject: ORA-07445, "SIGSEGV", & "address"??? All, I am about to open a TAR...painfully. Had a database (server?) crash a 2AM. Further sadness, the node/instance that crashed hung the other RAC node/instance...could not pull of the RAC reconfiguration...a whole other issue. One crash leads to another crash/hang :o|) I would like to get comments on the true meaning of "SIGBUS", "SIGSEGV", "...physical address", "...Address not mapped". I have always believed these to be Oracle/OS memory related issues? Thanks in advance, Chris Marquez Oracle DBA Errors in file /o01/app/oracle/admin/orcl/bdump/orcl2_j001_22478.trc: ORA-07445: exception encountered: core dump [kcbgtcr()+10562] [SIGBUS] [Non-existent physical address] [0x2C0AC00E] [] [] Thu May 19 02:00:08 2005 Errors in file /o01/app/oracle/admin/orcl/bdump/orcl2_diag_541.trc: ORA-07445: exception encountered: core dump [kghalf()+924] [SIGSEGV] [Address not mapped to object] [0x4001281] [] [] Thu May 19 02:00:13 2005 -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l