rdisp/PG_LOCAL is a SAP Parameter attribute which is used to control Size of the Local Work Process Paging Buffer 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 specifies the size of a work process in the paging buffer
in 8 KB blocks.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.