# SiloMessagingOptions.GatewaySenderQueues

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.runtime/orleans.configuration.silomessagingoptions/) | [Properties](/orleans/docs/api/csharp/microsoft.orleans.runtime/orleans.configuration.silomessagingoptions/properties/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Runtime/Configuration/Options/SiloMessagingOptions.cs)

```csharp
public int GatewaySenderQueues
```

Gets or sets the number of parallel queues and attendant threads used by the silo Gateway to send outbound messages (requests, responses, and notifications) to clients that are connected to it. If this attribute is not specified, then System.Environment.ProcessorCount is used.