Can I temporarily pause the RDF bulk loading process for a while and then recover it back to process?

Can I temporarily pause the RDF bulk loading process for a while and then
recover it back to process?

I am currently bulk loading DBpedia and Freebase data dumps into the
virtuoso open source edition v7 using the rdf_loader_run() procedure. The
database is on our server and I have another graph IRI in Virtuoso running
for an online service.The loading process largely effect the responsing
rate of the service. Can I use the rdf_loader_stop() in isql to
temporarily pause the loading threads and is it capable to recover back to
the former status of loading process by running rdf_loader_run() command
again?
The Official Wiki doesn't explain this well.