itsp/max_eg_mem_percent is a SAP Parameter attribute which is used to control High water mark for the ITS kernel plugin 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 .
This parameter sets the permitted level of EG memory consumption if the
integrated ITS creates a session or instantiates an HTML template. If
the EG memory has already reached this level before the operation, the
operation is rejected. The reason for this check is to prevent the
integrated ITS from using the entire EG memory and leaving no reserve
for the system. If messages appear in the system log indicating that
memory is exhausted, increase the size of the EG memory. See also the
parameter:
See SAP Parameter Documentation for full SAP documentation for this profile parameter.