Raven.Database.Config.StronglyTypedRavenSettings.GetDefaultMemoryCacheLimitMegabytes C# (CSharp) Method

		private int GetDefaultMemoryCacheLimitMegabytes()
		{
			var cacheSizeMaxSetting = new IntegerSetting(settings["Raven/Esent/CacheSizeMax"], 1024);

			// we need to leave ( a lot ) of room for other things as well, so we min the cache size
			var val = (MemoryStatistics.TotalPhysicalMemory/2) -
			          // reduce the unmanaged cache size from the default min
									cacheSizeMaxSetting.Value;

			if (val < 0)
				return 128; // if machine has less than 1024 MB, then only use 128 MB 

			return val;
		}