ORA-07445: exception encountered: core dump [krvrdegsFF()+21] [SIGSEGV] [Address not mapped to object]
未解决，记录一下

SQL> SELECT sql_redo FROM v$logmnr_contents;  
SELECT sql_redo FROM v$logmnr_contents
*
ERROR at line 1:
ORA-03113: end-of-file on communication channel


Wed Jul 21 00:56:17 2010
LOGMINER: Begin mining logfile for session -2147482879 thread 1 sequence 3966, /opt/oracle/oradata/archive/1_3966_689958410.dbf
Wed Jul 21 00:56:17 2010
LOGMINER: Begin mining logfile for session -2147482879 thread 1 sequence 3966, /opt/oracle/oradata/archive/1_3966_689958410.dbf
Wed Jul 21 00:56:17 2010
Errors in file /opt/oracle/admin/pkidb/udump/pkidb_ora_12463.trc:
ORA-07445: exception encountered: core dump [krvrdegsFF()+21] [SIGSEGV] [Address not mapped to object] [0x20] [] []


oracle@standby:~/oradata/archive> oerr ora 7445
07445, 00000, "exception encountered: core dump [%s] [%s] [%s] [%s] [%s] [%s]"
// *Cause: An OS exception occurred which should result in the creation of a
//         core file.  This is an internal error.
// *Action: Contact your customer support representative.