[Setting] MemoryLimit [Description] 
For the Report Server Windows service, specifies a memory threshold after which no new processing requests are accepted. Requests that are currently in progress are allowed to continue. This value is expressed as a percentage of available memory. Valid values range from 0 to maximum integer. The default is 60. For more information about memory limits and application domain recycling, see Configuring Available Memory for Reporting Services and Report and Snapshot Size Limits.