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ServiceThrottle.MaxConcurrentSessions Property

Gets or sets a value that specifies the maximum number of sessions a ServiceHost object can accept at one time.

Namespace:  System.ServiceModel.Dispatcher
Assembly:  System.ServiceModel (in System.ServiceModel.dll)

public int MaxConcurrentSessions { get; set; }

Property Value

Type: System.Int32
The maximum number of sessions a service host accepts. The default is 10.

The MaxConcurrentSessions property specifies the maximum number of channels a ServiceHost can accept. Each listener object can have one pending channel that does not count against the value of MaxConcurrentSessions until WCF accepts the channel and begins processing messages on it. This property is most useful in scenarios that make use of sessions.

NoteNote:

A trace is written every time the value of this property is exceeded. The first trace is written as a warning.

For more information about sessions, see Using Sessions.

Typically, this property is set using the ServiceThrottlingBehavior.MaxConcurrentSessions property.

The following code example shows the typical use of the ServiceThrottle by referencing the ServiceThrottlingBehavior in an application configuration file. In this case, the values that are specified establish, at most, one message processing at one time from one connection to one InstanceContext. Real-world usage must be determined through experience.

<configuration>
  <appSettings>
    <!-- use appSetting to configure base address provided by host -->
    <add key="baseAddress" value="http://localhost:8080/ServiceMetadata" />
  </appSettings>
  <system.serviceModel>
    <services>
      <service 
        name="Microsoft.WCF.Documentation.SampleService"
        behaviorConfiguration="Throttled" >
        <host>
          <baseAddresses>
            <add baseAddress="http://localhost:8080/SampleService"/>
          </baseAddresses>
        </host>
        <endpoint
          address=""
          binding="wsHttpBinding"
          contract="Microsoft.WCF.Documentation.ISampleService"
         />
        <endpoint
          address="mex"
          binding="mexHttpBinding"
          contract="IMetadataExchange"
         />
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior  name="Throttled">
          <serviceThrottling 
            maxConcurrentCalls="1" 
            maxConcurrentSessions="1" 
            maxConcurrentInstances="1"
          />
          <serviceMetadata 
            httpGetEnabled="true" 
            httpGetUrl=""
          />
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>
</configuration>

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0

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