![]() See Also: Oracle Database Concepts and Oracle Database Administrator’s Guide The LOG_ARCHIVE_MAX_PROCESSES initialization parameter specifies the number of ARC n processes that the database initially invokes. Possible processes are ARC0-ARC9 and ARCa-ARCt. ![]() The database starts multiple archiver processes as needed to ensure that the archiving of filled online redo logs does not fall behind. LGWR cannot reuse and overwrite an online redo log group until it has been archived. Rebalances data extents within an Oracle ASM disk groupĪRB0 uses the value of the ASM_POWER_LIMIT initialization parameter for the Oracle ASM instance as the maximum power for disk rebalancing.Ĭopies the redo log files to archival storage when they are full or an online redo log switch occursĪRC n processes exist only when the database is in ARCHIVELOG mode and automatic archiving is enabled, in which case ARC n automatically archives online redo log files. This process is automatically started on instance startup. The coordinator process name is AP nn, where nn can include letters and numbers.įor more information about the coordinator process, see V$XSTREAM_APPLY_COORDINATOR for XStream and V$GG_APPLY_COORDINATOR for Oracle GoldenGate.ĭatabase instances, Logical Standby, XStream Inbound servers, XStream Outbound servers, GoldenGate Integrated ReplicatĪQPC is responsible for performing administrative tasks for AQ Master Class Processes including commands like starting, stopping, and other administrative tasks. Obtains transactions from the reader server and passes them to apply servers In general, ACMS is limited to small, nonblocking state changes for a limited set of cross-instance operations.ĭatabase Apply Process Coordinator Process As a result, this process can exhibit a variety of behaviors. ACMS is the process in which a distributed operation is called. The ACMS process works with a coordinating caller to ensure that an operation is executed on every instance in Oracle RAC despite failures. These membership changes are required for the file system to maintain file system consistency within the cluster.Ītomic Control File to Memory Service ProcessĬoordinates consistent updates to a control file resource with its SGA counterpart on all instances in an Oracle RAC environment The ACFS process delivers CSS membership changes to the cluster file system. Tracks the cluster membership in CSS and informs the file system driver of membership changes Oracle Automatic Storage Management Cluster File System (Oracle ACFS) CSS Process See Also: Oracle Database Backup and Recovery User’s Guide ABMR and BMR n terminate after being idle for a long time. When a process submits a block media recovery request to ABMR, it dynamically spawns slave processes (BMR n) to perform the recovery. Coordinates execution of tasks such as filtering duplicate block media recovery requests and performing flood control
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