ServiceThrottle.MaxConcurrentSessions Property

Definition

Namespace:

System.ServiceModel.Dispatcher

Assembly:

System.ServiceModel.dll

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

public:
 property int MaxConcurrentSessions { int get(); void set(int value); };

public int MaxConcurrentSessions { get; set; }

member this.MaxConcurrentSessions : int with get, set

Public Property MaxConcurrentSessions As Integer

Property Value

Int32

The maximum number of sessions a service host accepts. The default is 100 * number of processors in the computer.

Examples

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>

Remarks

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.

Note

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.