rdisp/max_file_entries is a SAP Parameter attribute which is used to control 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 .
The file table manages the files opened by the VMs of the VMC (Virtual
Machine Container). The size of this table is configured with this
parameter. If the parameter has the value DEFAULT, the size is
calculated internally with the formula
maximum number of VMs * 200
.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.