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,
RABL - Rebalancer: It opens all the device files as part of disk discovery and coordinates the ARB processes for rebalance activity.
ARBx - Actual Rebalancer: They perform the actual rebalancing activities. The number of ARBx processes depends on the ASM_POWER_LIMIT init parameter.
ASMB - ASM Bridge: This process is used to provide information to and from the Cluster Synchronization Service (CSS) used by ASM to manage the disk resources. Responsible to communicate the database Instance to the ASM Instance, provides the heartbeat to the ASM instance.
ORBn - Rebalance ASM data extent movements. There can be many of this at the same time.
OSMB - (ASM) Any database instance that is using an ASM disk group will contain a background process called OSMB. The OSMB process is responsible for communicating with the ASM instance..Helps to manage the drive storage.
RABL - Rebalancer: It opens all the device files as part of disk discovery and coordinates the ARB processes for rebalance activity.
ARBx - Actual Rebalancer: They perform the actual rebalancing activities. The number of ARBx processes depends on the ASM_POWER_LIMIT init parameter.
ASMB - ASM Bridge: This process is used to provide information to and from the Cluster Synchronization Service (CSS) used by ASM to manage the disk resources. Responsible to communicate the database Instance to the ASM Instance, provides the heartbeat to the ASM instance.
ORBn - Rebalance ASM data extent movements. There can be many of this at the same time.
OSMB - (ASM) Any database instance that is using an ASM disk group will contain a background process called OSMB. The OSMB process is responsible for communicating with the ASM instance..Helps to manage the drive storage.
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