Microsoft UCMA:未对字符串进行垃圾回收

Question

我在我的UCMA应用程序上运行了一个内存分析器，它作为一个客户端将记录器参与者添加到会话中，并且我注意到许多字符串实例正在消耗内存(即使参与者被移除并且经过一段时间的不活动，我也注意到这些字符串不会被垃圾收集)：

Microsoft.Rtc.Collaboration!Microsoft.Rtc.Signaling.DiagnosticsInformation..ctor( int,DiagnosticVisibility )
Microsoft.Rtc.Collaboration!Microsoft.Rtc.Signaling.DiagnosticsInformation.CreateOutgoingDiagnosticsInformation( uint )
Microsoft.Rtc.Collaboration!Microsoft.Rtc.Collaboration.Call.SignalingSession_StateChanged( object,SignalingStateChangedEventArgs )
Microsoft.Rtc.Collaboration!Microsoft.Rtc.Signaling.EventWorkitem<TEventArgs>.Process()
Microsoft.Rtc.Collaboration!Microsoft.Rtc.Signaling.WorkitemQueue.ProcessItems()
Microsoft.Rtc.Collaboration!Microsoft.Rtc.Signaling.SerializationQueue<T>.ResumeProcessing()
Microsoft.Rtc.Collaboration!Microsoft.Rtc.Signaling.SerializationQueue<T>.ResumeProcessingCallback( object )
Microsoft.Rtc.Collaboration!Microsoft.Rtc.Signaling.QueueWorkItemState.ExecuteWrappedMethod( WaitCallback,object )
mscorlib!System.Threading.ExecutionContext.Run( ExecutionContext,ContextCallback,object )
mscorlib!System.Threading._ThreadPoolWaitCallback.PerformWaitCallbackInternal( _ThreadPoolWaitCallback )
mscorlib!System.Threading._ThreadPoolWaitCallback.PerformWaitCallback( object )

我看到了大约2000个这样的实例，它们还没有被清理。有没有人以前见过这种情况，知道原因是什么，或者这是不是框架本身的UCMA问题？

编辑:我也看到框架上有很多反序列化(XML反序列化对象没有被清理？)

System.Xml!System.Xml.Serialization.XmlSerializer.Deserialize( XmlReader,string,XmlDeserializationEvents )
System.Xml!System.Xml.Serialization.XmlSerializer.Deserialize( XmlReader,string )
Microsoft.Rtc.Collaboration!Microsoft.Rtc.Signaling.XmlHelper.DeserializeObjectFragment( byte[],XmlSerializer )
Microsoft.Rtc.Collaboration!Microsoft.Rtc.Collaboration.Conferencing.ConferenceJoinCommandResponse.TryProcessResponseCore( SipMessageData,ref RealTimeException )
Microsoft.Rtc.Collaboration!Microsoft.Rtc.Collaboration.Conferencing.EstablishFocusSessionsAsyncResult.ParticipateCallback( IAsyncResult )
Microsoft.Rtc.Collaboration!Microsoft.Rtc.Signaling.CompletionCallbackWorkItem.Microsoft.Rtc.Signaling.IWorkitem.Process()
Microsoft.Rtc.Collaboration!Microsoft.Rtc.Signaling.WorkitemQueue.ProcessItems()
Microsoft.Rtc.Collaboration!Microsoft.Rtc.Signaling.SerializationQueue<T>.ResumeProcessing()
Microsoft.Rtc.Collaboration!Microsoft.Rtc.Signaling.SerializationQueue<T>.ResumeProcessingCallback( object )
Microsoft.Rtc.Collaboration!Microsoft.Rtc.Signaling.QueueWorkItemState.ExecuteWrappedMethod( WaitCallback,object )
mscorlib!System.Threading.ExecutionContext.Run( ExecutionContext,ContextCallback,object )
mscorlib!System.Threading._ThreadPoolWaitCallback.PerformWaitCallbackInternal( _ThreadPoolWaitCallback )
mscorlib!System.Threading._ThreadPoolWaitCallback.PerformWaitCallback( object )

Answer 1

垃圾收集不会由some time of inactivity触发。在内存中看到大量string或其他类的实例并没有什么错。并且不会收集内部字符串(编译时间常量)。

除非出现内存不足异常，否则不会发生内存泄漏。