If you query the two databases parallel then the response time should be equal to the slowest one of the two database responses (not the sum of them). But if y

If you query the two databases parallel then the response time should be equal to the slowest one of the two database responses (not the sum of them). But if you use two database then you have to maintain both of them and if they are on the same server then sharing the same resource could make them slower than just using one db.