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Oracle® Database Reference
11g Release 2 (11.2)

Part Number E10820-03
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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.

If CLUSTER_DATABASE is set to false, then 0

If ASM, then 1

Modifiable No
Range of values 1 to 36
Basic No
Oracle RAC Multiple instances can have different values.

GCS_SERVER_PROCESSES specifies the number of background GCS server processes (LMS0, ... LMS9 and LMSa, ... LMSz) to serve the inter-instance traffic among Oracle RAC instances. GCS server processes are only seen in an Oracle RAC environment.