why does multichain randomly populate blocks?

Question

Why does multichain start to create random blocks (mostly of the time empty) when it is firt started? How to stop this and have only transactions and blocks generated by me?

Answer 1

Assuming your chain has not been set up with the parameter anyone-can-mine=true, only nodes with an address which have been granted the mine permission can create blocks.

As for mining empty blocks, please see the documentation for the mine-empty-rounds blockchain parameter on this page: http://www.multichain.com/developers/blockchain-parameters/