is/HTTP/lb_capacity is a SAP Parameter attribute which is used to control Set capacity of an AS ABAP for load balancing. 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 .
SAP Web Dispatcher distributes inbound HTTP requests using a loaded load
balancing procedure. A larger server therefore contains more requests
than a smaller one. The number of dialog work processes is normally used
for the size of an application server. The value can be overwritten with
is/HTTP/lb_capacity so that an application server for the Web Dispatcher
appears larger or smaller and more or fewer requests are dispatched to
it as required.
The parameter is set in the profile of the application server.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.