> ## Documentation Index
> Fetch the complete documentation index at: https://ancplua.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# AL0092 - Consider configuring sampling

> High-volume services need sampling to control telemetry costs

Source: [Al0092ConsiderSamplingAnalyzer.cs](https://github.com/ANcpLua/ANcpLua.Analyzers/blob/main/src/ANcpLua.Analyzers/Analyzers/Al0092ConsiderSamplingAnalyzer.cs)

## Description

High-volume services should configure a sampler to control the volume and cost of telemetry data. Without sampling, trace storage costs can grow unbounded.

## Bad Code

```csharp theme={null}
builder.Services.AddOpenTelemetry()
    .WithTracing(t => t.AddOtlpExporter());
// No sampler configured - defaults to AlwaysOn
```

## Good Code

```csharp theme={null}
builder.Services.AddOpenTelemetry()
    .WithTracing(t => t
        .SetSampler(new TraceIdRatioBasedSampler(0.1))
        .AddOtlpExporter());
```

## Properties

* **Category**: OpenTelemetry
* **Severity**: Info
* **Enabled by default**: True
* **Code fix available**: False

## Configuration

```editorconfig theme={null}
dotnet_diagnostic.AL0092.severity = suggestion
```