# IEventHubQueueCache.SignalPurge

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.streaming.eventhubs/orleans.streaming.eventhubs.ieventhubqueuecache/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.streaming.eventhubs/orleans.streaming.eventhubs.ieventhubqueuecache/methods/)

```csharp
public abstract void SignalPurge()
```

Send purge signal to the cache, the cache will perform a time based purge on its cached messages