dbs/db4/use_data_direct is a SAP Parameter attribute which is used to control Do not use RLE data compression over the network information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
This parameter controls, whether XDN uses Run-Length-Encoding (RLE) when
sending data over the network. For more information, see SAP Note
1643484.
This parameter only has effect, if
See SAP Parameter Documentation for full SAP documentation for this profile parameter.