ARCH
From Oracle FAQ
ARCH (Oracle's ARCHiver Process) is an Oracle background process created when you start an instance in ARCHIVE LOG MODE. The ARCH process will archive on-line redo log files to an archive destination, typically a directory on the database server.
Check process[edit]
The following Unix/Linux command is used to check if the ARCH process are running:
$ ps -ef | grep arc oracle 4414 1 0 20:27 ? 00:00:00 ora_arc0_orcl oracle 4416 1 0 20:27 ? 00:00:00 ora_arc1_orcl oracle 4418 1 0 20:27 ? 00:00:00 ora_arc2_orcl oracle 4420 1 0 20:27 ? 00:00:00 ora_arc3_orcl
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