In my experience the throughput of the import is essentially controlled by the Java Heap size setting you have on Java - the default is extremely small, so I would definitely seek to increase it but by how much it will depend on how big the environment is and how much memory you do have. Can’t seem to find the official documetation for it right now but it is done via -Xmx#IntergerVALUE#m in #InstallPath#\wlp\usr\servers\server1\jvm.options. Furthermore, there a bunch of things you can tweak on both BFI configuration & SQL side to improve imports - a bunch of categories available for it here.