DIR_MEMORY_INSPECTOR is a SAP Parameter attribute which is used to control path for memory inspector files 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 system parameter DIR_MEMORY_INSPECTOR contains the path to which
memory snapshots are written, and where the system is to search for
memory snapshots. You should ensure that this directory provides enough
space, since the snapshots may be very large.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.