PSPPMSRV servers subscribe to performance metrics published by the web service at the PPMI URL (specified in the Performance Monitor administration pages) and insert them into the database. If you select Y when you are asked whether you want Performance Collators configured, then the number of PSPPMSRVs specified in Min Instances=1 will be started. Min and Max instances should be set to the same value, as new PSPPMSRV serversare not spawned on demand.
The number of servers started at boot time. This translates to the PSPPMSRV server's –m (min) parameter in the UBB file.
The maximum number of servers that can be started. This translates to the PSPPMSRV server's –M (max) parameter in the UBB file.