es/disclaim_coasting_time_free is a SAP Parameter attribute which is used to control Control EM usage against operating system 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 .
Background You can use this group of instance profile parameters (see below) to control the amount of memory released for the operating system depending on the fill level of the extended memory and thereby minimize the associated disadvantages. Memory above an adjustable threshold in the extended memory is always released for the operating system. As soon as this threshold is exceeded, memory below this threshold can also be released for the operating system for a specified time period. When EM blocks are released, a definable size of the upper section of the EM block can also be released for the operating system. es/disclaim_coasting_time_free determines, in a similar way to the parameter
See SAP Parameter Documentation for full SAP documentation for this profile parameter.