ASM Background Processes

ASM Background Processes 

Like normal database instances ASM instance too have the usual background processes like SMON, PMON, DBWr, CKPT and LGWr.
In addition to that the ASM instance also have the following background processes.

1.RBAL-
Opens all device files as part of discovery and coordinate the rebalance activity.

2.ARBx -
These are the slave processes that do the rebalance activity.

3.GMON-
 This process is responsible for managing the disk-level activities(drop/off-line) and advancing disk group compatibility.

4.MARK-
The Mark Allocation Unit (AU) for Re sync Coordinator (MARK)process coordinates the updates to the Staleness Registry when the disks go off-line.
This process runs in the RDBMS instance and is started only when disks go off-line in ASM redundancy disk groups.

5.Onnn-
One or more slave process forming a pool of connection to the ASM instance for exchanging message.

6.PZ9x-
These processes are parallel slave processes (where x is a number),used in fetching data on behalf of GV$ queries.

7.VKTM-
 This process is used to maintain the fast timer and has the same functionality in the RDBMS instances.

Note--
On Unix, the ASM processes can be listed using the following command:

ps –ef|grep asm