rsdb/otr/max_objects is a SAP Parameter attribute which is used to control Maximum number of objects in Online Text Repository 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 .
Specifies the maximum number of objects that can be simultaneously held
in the Online Text Repository buffer. If this limit is exceeded then it
is tried to suppress the buffer objects that are no longer referenced.
To estimate a suitable value for the parameter, divide the size of the
buffer (see parameter rsdb/obj/buffersize) by the expected average size
of the individual objects. Round up the value produced by this
calculation.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.