Typically, Oracle GoldenGate users do not interact with the Collector process. This is known as a dynamic collector. It is started dynamically by the Manager process, but parameters may be sent to Collector as options of certain Extract or Replicat parameters.
As an alternative to allowing Manager to run Collector, you can run a static Collector manually by running the SERVER program at the command line with the following syntax and input parameters as shown:
server parameter [parameter] [...]
Collector parameters are case-sensitive and must be preceded by a dash. For example, -e and -E are two different parameters, with entirely different results.