GCS_SERVER_PROCESSES

1.135 GCS_SERVER_PROCESSES

GCS_SERVER_PROCESSES specifies the number of background GCS server processes (LMSn and LMnn) to serve the inter-instance traffic among Oracle RAC instances.

Property	Description
Parameter type	Integer
Default value	If 1 - 3 CPUS, then `1` If 4 - 15 CPUs, then `2` If 16 or more CPUs, then `2` + (CPUs / 32). If the result includes a fraction, then the fraction is disregarded. For example, if you had 20 CPUs, then 2 + (20 / 32) would equal 2 GCS processes.^Foot 1 If `CLUSTER_DATABASE` is set to `false`, then `0` If Oracle ASM, then `1`
Modifiable	No
Modifiable in a PDB	No
Range of values	`0` if Oracle RAC is disabled (`CLUSTER_DATABASE` is set to `false`) `1` to `100` if Oracle RAC is enabled (`CLUSTER_DATABASE` is set to `true`)
Basic	No
Oracle RAC	Multiple instances can have different values.

^Footnote 1

On certain operating systems, the RDBMS optimizes the default allocation of background GCS server processes based on the core to thread ratio of the CPU.

GCS server processes are only seen in an Oracle RAC environment.