这里是否使用了本地缓存?为什么这么慢的IEnumerable求值

在EAV模式中处理大约4600个对象，大约140,000个属性，当序列化为单个集合时，总共代表不到25 MB;不确定序列化时到底有多大，因为它们在这里，作为4600个单独的缓存项。

为了解决EAV属性方案加载时间问题，我们正在尝试在启动时启动AppFabric，并依赖本地缓存。然而，当从GetObjectsByTag或GetObjectsInRegion的IEnumerable被评估时，我观察到一些非常糟糕的性能:

   var products = new Dictionary<string, ProductContract>();
   Trace.WriteLine(DateTime.Now.ToLongTimeString() + " retrieving object collection from cache");
   //object productsObj = _cache.Get(ProductCollectionNameInCache, this.CacheRegion);
   //var productsObjUneval = _cache.GetObjectsByTag(ProductCacheTag, this.CacheRegion);
   var productsObjUneval = _cache.GetObjectsInRegion(this.CacheRegion);
   Trace.WriteLine(DateTime.Now.ToLongTimeString() + " retrieving object collection from cache complete");
   Trace.WriteLine(DateTime.Now.ToLongTimeString() + " evaluating IEnumerable object");
   var productsObj = productsObjUneval.Where(p=>p.Key != ProductsPrimedFlagNameInCache).ToList();
   Trace.WriteLine(DateTime.Now.ToLongTimeString() + " end evaluating IEnumerable object");
   Trace.WriteLine(DateTime.Now.ToLongTimeString() + " converting object collection to Dictionary<string, ProductContract>");
   products = productsObj.ToDictionary(p => p.Key, p => (ProductContract) p.Value);
   Trace.WriteLine(DateTime.Now.ToLongTimeString() + " end converting object collection to Dictionary<string, ProductContract>");

事件日志输出:

Level   Date and Time   Source  Event ID    Task Category
Information 4/27/2011 12:55:22 PM   EPC Service 0   None    12:55:22 PM end getting products from cache
Information 4/27/2011 12:55:22 PM   EPC Service 0   None    12:55:22 PM end converting object collection to Dictionary<string, ProductContract>
Information 4/27/2011 12:55:22 PM   EPC Service 0   None    12:55:22 PM converting object collection to Dictionary<string, ProductContract>
Information 4/27/2011 12:55:22 PM   EPC Service 0   None    12:55:22 PM end evaluating IEnumerable object
Information 4/27/2011 12:55:05 PM   EPC Service 0   None    12:55:05 PM evaluating IEnumerable object
Information 4/27/2011 12:55:05 PM   EPC Service 0   None    12:55:05 PM retrieving object collection from cache complete
Information 4/27/2011 12:55:05 PM   EPC Service 0   None    12:55:05 PM retrieving object collection from cache
Information 4/27/2011 12:55:05 PM   EPC Service 0   None    12:55:05 PM getting products from cache
Information 4/27/2011 12:55:05 PM   EPC Service 0   None    12:55:05 PM is cache primed? True

编辑:调用所有对象的标签，或所有对象的区域，总是违背分布式缓存，而不是本地?那将是非常令人失望的，而且完全不能满足我们的需要。http://social.msdn.microsoft.com/forums/en us/velocity/thread/c0f1863a - 87 - d6 - 43 - bc - 8 ea5 - 667 - f072040d2