Still learning the db, so this may seem like an elementary architecture question but here goes:

When I shutdown normal on the db bdwh I still have processes that are running. Why is it that all process are not shutdown when performing a graceful shutdown of the db? I am sure that most know this but the processes are as follows:

oracle 28478 1 0 14:27:42 ? 0:00 ora_smon_bdwh
oracle 28488 1 0 14:27:42 ? 0:00 ora_snp3_bdwh
dwload 1170 13509 0 14:36:11 pts/9 0:00 grep bdwh
oracle 28480 1 0 14:27:42 ? 0:00 ora_reco_bdwh
oracle 28476 1 0 14:27:41 ? 0:00 ora_ckpt_bdwh
oracle 28474 1 0 14:27:41 ? 0:00 ora_lgwr_bdwh
oracle 28486 1 0 14:27:42 ? 0:00 ora_snp2_bdwh
oracle 28472 1 0 14:27:41 ? 0:00 ora_dbw0_bdwh
oracle 28484 1 0 14:27:42 ? 0:00 ora_snp1_bdwh
oracle 28482 1 0 14:27:42 ? 0:00 ora_snp0_bdwh
oracle 28470 1 0 14:27:41 ? 0:00 ora_pmon_bdwh