This processing is part of the Cache Fusion feature. The LMS process also controls the flow of messages to remote instances and manages global data block access and transmits block images between the buffer caches of different instances. LMS: Global Cache Service Process The LMS process maintains records of the data file statuses and each cached block by recording information in a Global Resource Directory (GRD). LMON: Global Enqueue Service Monitor The LMON process monitors global enqueues and resources across the cluster and performs global enqueue recovery operations.īACKGROUND P ROCESSES OF ORACLE 12 C RAC LMD: Global Enqueue Service Daemon The LMD process manages incoming remote resource requests within each instance. GTX0-j: Global Transaction Process The GTX0-j process provides transparent support for XA global transactions in an Oracle RAC environment.The database autotunes the number of these processes based on the workload of XA global transactions. The Oracle RAC processses and their identifiers are as follows: ACMS: Atomic Controlfile to Memory Service (ACMS) In an Oracle RAC environment, the ACMS per-instance process is an agent that contributes to ensuring a distributed SGA memory update is either globally committed on success or globally aborted if a failure occurs. ORACLE RAC ADMINISTRATION C H E TA N G U P T EīACKGROUND P ROCESSES OF ORACLE 12 C RAC The GCS and GES processes, and the GRD collaborate to enable Cache Fusion.

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