dotnet-cqrs/docs/troubleshooting/consumer-lag.md

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# Consumer Lag
Diagnose and fix consumer lag.
## Identifying Lag
```csharp
var lag = streamHead - checkpoint;
```
## Fixing Lag
1. Increase batch size
2. Add more consumers
3. Optimize event handlers
4. Check database performance
## See Also
- [Troubleshooting Overview](README.md)
- [Consumer Groups](../event-streaming/consumer-groups/README.md)