Very Bad Performance - IDOC, LSMW

Hi all!

The members of consultant team are very concerned regarding of the performance showed by the Application Server during an initial load of clients. For these loads they use many txt files with many records. They say me that the performance is very bad and the server is processing less than 3 records/sec. There are more than 700.000 records to process...

From SM50 i can view that the process is using one PID that is consuming 100% of 1 processor. There are 4 CPUs available but just one is being used. The table being modified is VBAP and i can see just "Sequential read" en acction field... I know these processes are very resource intensive, but it seems to me that something is not OK. What can i do to diagnose the problem? Maybe something related to developing?

Thanks to all!