This parameter is only relevant if you are using Oracle Real Application Cluster (RAC).
The instances running in parallel to the dedicated database instance are defined by this parameter.
Syntax
parallel_instances = <inst_descr>|(<inst_descr_list>)
Default value: none.
Possible value:
<inst_descr>: <ORACLE_SID>:<ORACLE_HOME>@<conn_name>
where:
<ORACLE_SID>: Oracle System ID of the parallel instance
<ORACLE_HOME>: ORACLE_HOME directory of the parallel instance
<conn_name>: Oracle connection name from TNSNAMES.ORA for connect to the parallel instance
Example
parallel_instances = (RAC001:/oracle/RAC/101_64@RAC001, RAC002:/oracle/RAC/102_64@RAC002, RAC003:/oracle/RAC/101_64@RAC003
Note
Specify all database instances in this parameter.