IDOC-XI-JDBC scenario, jdbc sent too slow

i have a IDOC-XI-JDBC scenario,

the problem is that near 5 Lac IDOC is sent to XI, each IDOC is processes by an instance of the scenario, and the sent to the Database is too clow...means 4000 records per hour,

can i configure the JDBC receiver adapter in a way, so that it becomes faster/more concurrent,