Archivos core

Tengo un problemita, se me están generando una gran cantidad de cores y no tengo explicación. Me meti en el alert.log y consegui esto:
ORA-07445: exception encountered: core dump [11] [536849048] [0] [0] [] []
Fri Oct 3 17:15:18 2003
Errors in file /sistemas/oracle/rdbms/log/snp3_27101.trc:
ORA-07445: exception encountered: core dump [11] [536849048] [0] [0] [] []
Fri Oct 3 17:15:30 2003
Restarting dead background process SNP0
SNP0 started with pid=13
Fri Oct 3 17:15:30 2003
Restarting dead background process SNP1
SNP1 started with pid=20
Fri Oct 3 17:15:30 2003
Restarting dead background process SNP2
SNP2 started with pid=24
Fri Oct 3 17:15:30 2003
Restarting dead background process SNP3
SNP3 started with pid=27
Fri Oct 3 17:15:30 2003
Restarting dead background process SNP5
SNP5 started with pid=28
Fri Oct 3 17:15:35 2003
Errors in file /sistemas/oracle/rdbms/log/snp0_28091.trc:
ORA-07445: exception encountered: core dump [11] [536849048] [0] [0] [] []
Fri Oct 3 17:16:28 2003
Restarting dead background process SNP4
SNP4 started with pid=13
Fri Oct 3 17:17:03 2003
Errors in file /sistemas/oracle/rdbms/log/snp4_25106.trc:
ORA-07445: exception encountered: core dump [11] [536849048] [0] [0] [] []
Eso de SNP me parecen que es algo de Snapshots, ciertamente tengo algunos, ¿pero qué pudo haber pasado?, igual tengo snapshots en otras BD y no me esta generando este problema. Es como si hubiese algo "pegado", pero no se que.