Specifies volume of safe memory usage per call.
The amount of memory in bytes, using which during the call to the server is safe and does not lead to the end of the call even when the maximum amount of memory the working server is reached.
Possible values from -1 to 9223372036854775807.
If value is 0, then safe memory usage is specified as 5% of the maximum amount of working processes memory in this working server.
If value is -1, every call is considered hazardous if it reached the maximum amount of memory of working processes.