Memory leaks Ninject中的内存泄漏

我正在调查一个运行高达10gb内存的webapp，通过使用Windbg分析内存转储

这是最下面的部分！dumpheap-stat输出：

00007ff9545df5d0   166523     13321840 System.Runtime.Caching.MemoryCache
00007ff9545df4a0   166523     14654024 System.Runtime.Caching.CacheMemoryMonitor
00007ff9545de990   166523     14654024 System.Runtime.Caching.SRef[]
00007ff9545dcef0   166523     14654024 System.Runtime.Caching.GCHandleRef`1[[System.Runtime.Caching.MemoryCacheStore, System.Runtime.Caching]][]
00007ff9545dfb28   166523     19982760 System.Runtime.Caching.MemoryCacheStatistics
00007ff956778510   333059     21315680 System.Int64[]
00007ff95679c988    41597     31250111 System.Byte[]
00007ff9545e08c8  1332184     31972416 System.Runtime.Caching.MemoryCacheEqualityComparer
00007ff9545dfe48  1332184     31972416 System.Runtime.Caching.SRef
00007ff956780ff0  1332200     31972800 System.SizedReference
00007ff956724620  1498777     35970648 System.Threading.TimerHolder
00007ff95677fb30  1536170     36868080 System.Runtime.Remoting.Messaging.CallContextSecurityData
00007ff956796f28  1606960     38567040 System.Object
00007ff9545df810  1332184     42629888 System.Runtime.Caching.GCHandleRef`1[[System.Runtime.Caching.MemoryCacheStore, System.Runtime.Caching]]
00007ff9545dda38  1332184     42629888 System.Runtime.Caching.UsageBucket[]
00007ff9567ae930  1332268     42632576 Microsoft.Win32.SafeHandles.SafeWaitHandle
00007ff9545df968  1498707     47958624 System.Runtime.Caching.GCHandleRef`1[[System.Threading.Timer, mscorlib]]
00007ff9567adbf8  1498777     47960864 System.Threading.Timer
00007ff9545dff50  1332184     53287360 System.Runtime.Caching.CacheUsage
00007ff94986ead8  1536137     61445480 System.Web.Hosting.AspNetHostExecutionContextManager+AspNetHostExecutionContext
00007ff9567a2838  1332210     63946080 System.Threading.ManualResetEvent
00007ff956796948   293525     66384986 System.String
00007ff9545dfef0  1332184     74602304 System.Runtime.Caching.CacheExpires
00007ff9567add20  1498760     95920640 System.Threading.TimerCallback
00007ff9545dfa90  1332184    106574720 System.Runtime.Caching.MemoryCacheStore
00007ff95679b3b0  1333289    106663120 System.Collections.Hashtable
00007ff95678f138  1536171    110604312 System.Runtime.Remoting.Messaging.LogicalCallContext
00007ff9545dffb0  1332184    127889664 System.Runtime.Caching.UsageBucket
00007ff95679d1e0  1333292    128664768 System.Collections.Hashtable+bucket[]
00007ff9567245c0  1498777    131892376 System.Threading.TimerQueueTimer
00007ff9567aec48  1536255    135190440 System.Threading.ExecutionContext
00007ff9545dcf78  1332184    351696576 System.Runtime.Caching.ExpiresBucket[]
000000f82c79d9f0   473339    385303992      Free
00007ff956799220 40309535   1617342672 System.Int32[]
00007ff9545e0468 39965520   3836689920 System.Runtime.Caching.ExpiresBucket

因此，有近4000万个

System.Runtime.Caching.ExpiresBucket

实例，总共使用了近4gb的内存

System.Runtime.Caching

类在排行榜上出现得相当多

我随机选取了一个

System.Runtime.Caching.ExpiresBucket

类的实例，并做了一个测试！我在上面签字。花了很长时间（也许30分钟）才产生了一个线程…可能有更多的线程，但我在这一点上中断了操作

参考链超过150万行！但我可以在这里展示重要的部分：

0:000> !gcroot 000000f82dd4bc28
Thread 1964:
    000000fcbdbce6a0 00007ff8f9bbe388 Microsoft.AspNet.SignalR.SqlServer.ObservableDbOperation.ExecuteReaderWithUpdates(System.Action`2<System.Data.IDataRecord,Microsoft.AspNet.SignalR.SqlServer.DbOperation>)
        rbp-58: 000000fcbdbce6e8
            ->  000000fa2d1f26a0 Microsoft.AspNet.SignalR.SqlServer.ObservableDbOperation+<>c__DisplayClass1e
            ->  000000fa2d1f2110 Microsoft.AspNet.SignalR.SqlServer.ObservableDbOperation
            ->  000000fa2d1f24d0 System.Action
            ->  000000fa2d1f24a8 System.Object[]
            ->  000000fa2d1f2468 System.Action
            ->  000000fa2d1f1008 Microsoft.AspNet.SignalR.SqlServer.SqlReceiver
            ->  000000fa2d1f1330 System.Action
            ->  000000fa2d1f1308 System.Object[]
            ->  000000fa2d1f12c8 System.Action
            ->  000000fa2d1efb70 Microsoft.AspNet.SignalR.SqlServer.SqlStream
            ->  000000fa2d1f1528 System.Action
            ->  000000fa2d1f1500 System.Object[]
            ->  000000fa2d1f14c0 System.Action
            ->  000000fa2d1efb20 Microsoft.AspNet.SignalR.SqlServer.SqlMessageBus+<>c__DisplayClass3
            ->  000000f92d0b84e0 Microsoft.AspNet.SignalR.SqlServer.SqlMessageBus
            ->  000000f92d0b9568 System.Threading.Timer
            ->  000000f92d0b96d8 System.Threading.TimerHolder
            ->  000000f92d0b95a0 System.Threading.TimerQueueTimer
[... about 100 lines of the same TimerQueueTimer line above, but different memory addresses each time]
           ->  000000f92cf1be68 System.Threading.TimerQueueTimer
            ->  000000f92cf1be08 System.Threading.TimerCallback
            ->  000000f92cf1bb48 System.Web.RequestTimeoutManager
            ->  000000f92cf1bb80 System.Web.Util.DoubleLinkList[]
            ->  000000f92cf1bc00 System.Web.Util.DoubleLinkList
            ->  000000fb61323860 System.Web.RequestTimeoutManager+RequestTimeoutEntry
            ->  000000fb6131fd38 System.Web.HttpContext
            ->  000000fbe682a480 ASP.global_asax
            ->  000000fbe682ac00 System.Web.HttpModuleCollection
            ->  000000fbe682ac60 System.Collections.ArrayList
            ->  000000fbe682b598 System.Object[]
            ->  000000fbe682b018 System.Collections.Specialized.NameObjectCollectionBase+NameObjectEntry
            ->  000000fbe682b000 System.Web.Routing.UrlRoutingModule
            ->  000000faacec1f40 System.Web.Routing.RouteCollection
            ->  000000faacec2030 System.Collections.Generic.List`1[[System.Web.Routing.RouteBase, System.Web]]
            ->  000000fa2cfe4d80 System.Web.Routing.RouteBase[]
            ->  000000f9acf14cd8 System.Web.Http.WebHost.Routing.HttpWebRoute
            ->  000000f9acf149f8 System.Web.Http.Routing.RouteCollectionRoute
            ->  000000f9acf1f4f0 System.Web.Http.Routing.SubRouteCollection
            ->  000000f9acf1f510 System.Collections.Generic.List`1[[System.Web.Http.Routing.IHttpRoute, System.Web.Http]]
            ->  000000fa2cf8f310 System.Web.Http.Routing.IHttpRoute[]
            ->  000000fa2ceff770 System.Web.Http.Routing.HttpRoute
            ->  000000fa2ceff678 System.Web.Http.Routing.HttpRouteValueDictionary
            ->  000000fa2ceff6f0 System.Collections.Generic.Dictionary`2+Entry[[System.String, mscorlib],[System.Object, mscorlib]][]
            ->  000000fa2cef9e78 System.Web.Http.Controllers.HttpActionDescriptor[]
            ->  000000fa2cef7898 System.Web.Http.Controllers.ReflectedHttpActionDescriptor
            ->  000000f9aced4608 System.Web.Http.HttpConfiguration
            ->  000000f9aced4db0 System.Net.Http.Formatting.MediaTypeFormatterCollection
            ->  000000f9aced6f40 System.Collections.Generic.List`1[[System.Net.Http.Formatting.MediaTypeFormatter, System.Net.Http.Formatting]]
            ->  000000f9aced6f80 System.Net.Http.Formatting.MediaTypeFormatter[]
            ->  000000f9aced4df8 System.Net.Http.Formatting.JsonMediaTypeFormatter
            ->  000000f9acf1f448 System.Web.Http.Validation.ModelValidationRequiredMemberSelector
            ->  000000f9acf1f468 System.Collections.Generic.List`1[[System.Web.Http.Validation.ModelValidatorProvider, System.Web.Http]]
            ->  000000f9acf1f490 System.Web.Http.Validation.ModelValidatorProvider[]
            ->  000000f9acf1db40 Ninject.Web.WebApi.Validation.NinjectDefaultModelValidatorProvider
            ->  000000faaceca438 Ninject.StandardKernel
            ->  000000faaceca498 Ninject.Components.ComponentContainer
            ->  000000faaceca538 System.Collections.Generic.Dictionary`2[[System.Type, mscorlib],[Ninject.Components.INinjectComponent, Ninject]]
            ->  000000f9acece000 System.Collections.Generic.Dictionary`2+Entry[[System.Type, mscorlib],[Ninject.Components.INinjectComponent, Ninject]][]
            ->  000000f9acecdac8 Ninject.Activation.Caching.GarbageCollectionCachePruner
            ->  000000f9acecdcb8 System.Threading.Timer
            ->  000000f9acecdd30 System.Threading.TimerHolder
            ->  000000f9acecdcd8 System.Threading.TimerQueueTimer
[... just under 1.5 million lines of the same TimerQueueTimer line above, but different memory addresses each time]
            ->  000000f82dd4c028 System.Threading.TimerQueueTimer
            ->  000000f82dd4bfc8 System.Threading.TimerCallback
            ->  000000f82dd4ada0 System.Runtime.Caching.CacheExpires
            ->  000000f82dd4add8 System.Runtime.Caching.ExpiresBucket[]
            ->  000000f82dd4bc28 System.Runtime.Caching.ExpiresBucket

0:000>！gcroot 000000 f82dd4BC28
线程1964：
000000 fcbdbce6a0 00007ff8f9bbe388 Microsoft.AspNet.signal.SqlServer.observedboooperation.ExecuteReaderWithUpdates（System.Action`2）
rbp-58:000000fcbdbce6e8
->000000 FA2D1F26A0 Microsoft.AspNet.signal.SqlServer.ObservableBOOperation+c__DisplayClass1e
->000000 FA2D1F2110 Microsoft.AspNet.SignalR.SqlServer.observedBoOperation
->000000 FA2D1F24D0系统。操作
->000000 FA2D1F24A8系统。对象[]
->000000 FA2D1F2468系统。操作
->000000 FA2D1F1008 Microsoft.AspNet.signal.SqlServer.SqlReceiver
->000000 FA2D1F1330系统。操作
->000000 FA2D1F1308系统。对象[]
->000000 FA2D1F12C8系统。操作
->000000 FA2D1EFB70 Microsoft.AspNet.signal.SqlServer.SqlStream
->000000 FA2D1F1528系统。操作
->000000 FA2D1F1500系统。对象[]
->000000 FA2D1F14C0系统。操作
->000000 FA2D1EFB20 Microsoft.AspNet.Signal.SqlServer.SqlMessageBus+c__DisplayClass3
->000000 F92D0B84E0 Microsoft.AspNet.signal.SqlServer.SqlMessageBus
->000000 F92D0B9568 System.Threading.Timer
->000000 F92D0B96D8 System.Threading.TimerHolder
->000000 F92D0B95A0 System.Threading.TimerQueueTimer
[…上面大约100行相同的TimerQueueTimer行，但每次都有不同的内存地址]
->000000 F92CF1BE68 System.Threading.TimerQueueTimer
->000000 F92CF1BE08 System.Threading.TimerCallback
->000000 F92CF1BB48 System.Web.RequestTimeoutManager
->000000 F92CF1BB80 System.Web.Util.DoubleLinkList[]
->000000 F92CF1BC00 System.Web.Util.DoubleLinkList
->000000 FB61323860 System.Web.RequestTimeoutManager+RequestTimeoutEntry
->000000 fb6131fd38 System.Web.HttpContext
->000000 FBE682A480 ASP.global\u asax
->000000 FBE682AC00 System.Web.HttpModuleCollection
->000000 FBE682C60 System.Collections.ArrayList
->000000 FBE682B598系统。对象[]
->000000 FBE682B018 System.Collections.Specialized.NameObjectCollectionBase+NameObjectEntry
->000000 FBE682B000 System.Web.Routing.UrlRoutingModule
->000000 FAACEC1F40 System.Web.Routing.RouteCollection
->000000 FAACEC030 System.Collections.Generic.List`1[[System.Web.Routing.RouteBase，System.Web]]
->000000 fa2cfe4d80 System.Web.Routing.RouteBase[]
->000000 F9ACF14CD8 System.Web.Http.WebHost.Routing.HttpWebRoute
->000000 F9ACF149F8 System.Web.Http.Routing.RouteCollectionRoute
->000000 F9ACF1F4F0 System.Web.Http.Routing.SubcuteCollection
->000000 f9acf1f510 System.Collections.Generic.List`1[[System.Web.Http.Routing.IHttpRoute，System.Web.Http]]
->000000 fa2cf8f310 System.Web.Http.Routing.IHttpRoute[]
->000000 fa2ceff770 System.Web.Http.Routing.HttpRoute
->000000 fa2ceff678 System.Web.Http.Routing.HttpRouteValueDictionary
->000000 fa2ceff6f0 System.Collections.Generic.Dictionary`2+条目[[System.String，mscorlib]，[System.Object，mscorlib][]
->000000 fa2cef9e78 System.Web.Http.Controllers.HttpActionDescriptor[]
->000000 fa2cef7898 System.Web.Http.Controllers.ReflectedHttpActionDescriptor
->000000 f9aced4608 System.Web.Http.HttpConfiguration
->000000 F9ACED4DB0 System.Net.Http.FORMATING.MediaTypeFormatterCollection
->000000 F9ACED6F40 System.Collections.Generic.List`1[[System.Net.Http.Formatting.MediaTypeFormatter，System.Net.Http.Formatting]]
->000000 f9aced6f80 System.Net.Http.Formatting.MediaTypeFormatter[]
->000000 f9aced4df8 System.Net.Http.Formatting.JsonMediaTypeFormatter
->000000 F9ACF1F448 System.Web.Http.Validation.ModelValidationRequiredMemberSelector
->000000 F9ACF1F468 System.Collections.Generic.List`1[[System.Web.Http.Validation.ModelValidatorProvider，System.Web.Http]]
->000000 F9ACF1F490 System.Web.Http.Validation.ModelValidatorProvider[]
->000000 F9ACF1DB40 Ninject.Web.WebApi.Validation.NinjectDefaultModelValidatorProvider
->000000 faaceca438 Ninject.StandardKernel
->000000 FAACECA498 Ninject.Components.ComponentContainer
->000000 faaceca538系统.集合.泛型.字典`2[[System.Type，mscorlib]，[Ninject.Components.INinjectComponent，Ninject]]
->000000 f9acece000 System.Collections.Generic.Dictionary`2+条目[[System.Type，mscorlib]，[Ninject.Components.INinjectComponent，Ninject][]
->000000 f9acecdac8 Ninject.Activation.Caching.GarbageCollectionCachePruner
->000000 F9ACEDCB8 System.Threading.Timer
->000000 F9ACEDD30 System.Threading.TimerHolder
->000000 F9ACEDCD8 System.Threading.TimerQueueTimer
[…上面同一TimerQueueTimer行的长度不到150万行，但每次都有不同的内存地址]
->000000 F82DD4C028 System.Threading.TimerQueueTimer