rdisp/tableCheckMode is a SAP Parameter attribute which is used to control Mode for checking of internal tables 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 .
To be able to identify any possible memory problems early, you can
activate a periodic check of the internal administration tables. See the
parameters listed below.
The parameter rdisp/tableCheckMode defines the scope of this check. You
can make two specifications:
ALLOCATED: Only the table entries that are currently in use are checked
ALL: All table entries are checked
You can activate the table check with the parameter
See SAP Parameter Documentation for full SAP documentation for this profile parameter.