nobuf/max_no_buffer_entries is a SAP Parameter attribute which is used to control Number Range Buffer Size 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 parameter defines the number of possible entries (and the size) of
the number range buffer.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.