Search Appliance SBE
If multiple custom primer URLs are being used, you can control which ones are used for which Base URLs via Base URL MM Query.
By default, primer URLs are only used on Base URLs that have a matching protocol and hostname. If Base URL MM Query is non-empty, then this Metamorph query will be run against the Base URL being walked. The associated primer URL will only be fetched if it matches.
Note that the "singles" process that handles Single Pages and
Page URLs run all configured primers.