About "arch1_31941_678636531.dbf" files

Hi, All -
Oracle 11g on RHEL5
These physical arch files are filling up the space available resulting in archiver errors. Please let me know if there is a way to turn this off and should I turn this off. We do take regular backups and I am not sure the use of these. Please let me know... Thanks!
Under $ORACLE_HOME/dbs
-rw-r----- 1 oraedw oinstall 47807488 Jul 28 11:37 arch1_31941_678636531.dbf
-rw-r----- 1 oraedw oinstall 48188928 Jul 28 11:37 arch1_31942_678636531.dbf
-rw-r----- 1 oraedw oinstall 49212416 Jul 28 11:37 arch1_31943_678636531.dbf
-rw-r----- 1 oraedw oinstall 47802368 Jul 28 11:37 arch1_31944_678636531.dbf
-rw-r----- 1 oraedw oinstall 47801856 Jul 28 11:37 arch1_31945_678636531.dbf
-rw-r----- 1 oraedw oinstall 47803392 Jul 28 11:37 arch1_31946_678636531.dbf
-rw-r----- 1 oraedw oinstall 47804928 Jul 28 11:37 arch1_31947_678636531.dbf
-rw-r----- 1 oraedw oinstall 47805440 Jul 28 11:38 arch1_31948_678636531.dbf
-rw-r----- 1 oraedw oinstall 48787456 Jul 28 11:38 arch1_31949_678636531.dbf
dallinux161 oraedw ccedw > pwd
/orahome10/ccedwdb/11.1/dbs

mbobak wrote:
You say you're taking regular backups. How, exactly? RMAN? Conventional, non-RMAN? Hot? Cold?
If you're taking a hot (aka "online") backup, the archive logs are aboslutely required for recovery. You MUST back them up, then remove them from the archive log area, to free space. This continual backup and removal of archive logs should be set up to run all day long, as needed, in between backups.Most people will allocate enough space to the archivelog destination to not require "continual" backup and removal. I find once a day, along with my database backup, to be sufficient. The most I've ever had to do was once every 6 hours.
>
If you're only taking cold (aka "offline") backups, then it depends on what your recovery point objective is. If you only care about recovering to the point in time that the backup was taken, then you don't need the archive logs, and can turn off archivelog mode on your database. If, however, you want to be able to recover up to the last committed transaction, then you need to remain in archivelog mode, and need to manage backups of the archive logs as I described in the previous paragraph. If that's the case, you should consider switching to hot backups, as there's no point in shutting down your database to take backups if you're in archivelog mode.
Hope that helps,
-Mark

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