A method of organizing a transmission of repository data includes receiving, in a computer system, a request to transmit data from a data repository to a data recipient, the data to be transmitted by executing batch jobs that each identify a data amount to be transmitted to the data recipient. Control parameters are individually assigned to each of the batch jobs. Upon detecting during transmission that a performance parameter of the computer system does not meet a predefined standard, the data amount identified by at least one of the batch jobs is automatically changed in accordance with the control parameter assigned to the at least one of the batch jobs. An optimizer may determine the control parameters by solving a constraint optimization problem. The optimizer may take into account system characteristics such as priorities, transmission constraints or the volume of the data to be transmitted.