BasicHttpBinding.MaxBufferPoolSize Property

Definition

Namespace:

System.ServiceModel

Assembly:

System.ServiceModel.dll

Gets or sets the maximum amount of memory, in bytes, that is allocated for use by the manager of the message buffers that receive messages from the channel.

public:
 property long MaxBufferPoolSize { long get(); void set(long value); };

public long MaxBufferPoolSize { get; set; }

member this.MaxBufferPoolSize : int64 with get, set

Public Property MaxBufferPoolSize As Long

Property Value

Int64

The maximum amount of memory, in bytes, available for use by the message buffer manager. The default value is 524288 (0x80000) bytes.

Examples

The following example sets this property to twice the default value.

BasicHttpBinding binding = new BasicHttpBinding();
// Use double the default value
binding.MaxBufferPoolSize = 0x80000 * 2;

The value of this property can also be set in the configuration file.

<configuration>
  <system.serviceModel>

    <bindings>
      <basicHttpBinding>
        <binding name="Binding1">

          <!-- set pool size to double default of 0x80000 -->
          maxBufferPoolSize = 0x100000

          <security mode="None" />
        </binding>
      </basicHttpBinding>
    </bindings>

  </system.serviceModel>

</configuration>

Remarks

The BufferManager minimizes the cost of using buffers by using a buffer pool. Buffers are required to process messages by the service when they come out of the channel. If there is not sufficient memory in the buffer pool to process the message load, the BufferManager must allocate additional memory from the CLR heap, which increases the garbage collection overhead. Extensive allocation from the CLR garbage heap is an indication that the buffer pool size is too small and that performance can be improved with a larger allocation by increasing the MaxBufferPoolSize limit.