rdisp/vb_factor is a SAP Parameter attribute which is used to control Load balancing for Update Servers 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 .
rdisp/vb_factor profile paramerter attributes
Load balancing for Update Servers
( See IF_PARAMETER_TYPES
Check Function Exists:
The dispatch of update requests occurs after a very simple procedure:
Each application server leads a list of active update servers and their
configured update work processes.
Every update server with the relevant content are assigned the update
requests dynamically (see parameter
rdisp/vb_context> or rdisp/vb2_context>).
An update work process is assigned to all update work processes in a
disptach cycle. It is switched to the update server after every
assignment. This means, within a dispatch cycle a server is assigned as
many VB requests as update work processes are assigned for it.
This parameter lets you determine the number of update work processes
relevant for dispatching, for example, to assign more VB requests to
faster servers. This number is determined by the current number of
update processes and the value of rdisp/vb_factor.
After processing the U1 update requests, the U2 part is dispatched.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.