Oracle - How can we keep track of active instances? posted by 
											Babu Kunwar
								How can we keep track of active instances?
								Use enterprise manager, SQLPLUS, and SRVCTL to administer database instance.
								 
								Inorder to start any database instance execute the following command: 
									srvctl start instance -d db_name -i "inst_name_list" [-o start_options] [-c 
									connect_str | -q] 
									Remember: This command will also start all enabled and non-running services 
									that have the listed instances. 
								Stopping one ort more instance: 
									srvctl stop instance -d name -i "inst_name_list" [-o stop_options] [-c 
									connect_str | -q] 
								To start or stop your entire cluster database, that is, all of the instances and 
									its enabled services: 
									srvctl start database -d name [-o start_options] [-c connect_str | -q] 
									srvctl stop database -d name [-o stop_options] [-c connect_str | -q] 
								
								
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