X-Ray sampling rate exceeded.

AWS X-Ray is a service that allows you to trace requests made to your application identify performance bottlenecks and troubleshoot errors. The sampling rate in X-Ray determines the percentage of requests that are traced.

If you receive a "Sampling rate exceeded" error, it means that you are trying to trace more requests than your configured sampling rate allows. Here's how you can address this issue:

1. Increase Sampling Rate:
   • You can increase the sampling rate in the X-Ray settings to trace a higher percentage of requests. Keep in mind that this may lead to increased costs and potentially a higher load on your application.
2. Optimize Sampling Rules:
   • Review and optimize your sampling rules to focus on the most critical requests. You can create custom sampling rules to ensure that only specific types of requests are traced.
3. Reduce Tracing for Certain Endpoints or Routes:
   • If there are specific endpoints or routes that do not require detailed tracing, you can exclude them from being traced.
4. Consider Custom Sampling Strategies:
   • If the default sampling strategies do not meet your needs, consider implementing custom sampling logic based on specific criteria relevant to your application.
5. Use X-Ray Annotations and Metadata Sparingly:
   • Minimize the use of annotations and metadata, as these can increase the amount of data sent to X-Ray and affect the sampling rate.
6. Batch Traces with AWS Lambda:
   • If you are using AWS Lambda, consider using batch processing to group multiple traces into a single segment, which can help reduce the overall number of traces.
7. Monitor Service Quotas:
   • Check your AWS account for any service quotas related to X-Ray. If you're approaching the limit, consider requesting a quota increase.
8. Review and Optimize Application Code:
   • Optimize your application code to reduce the number of traceable requests, if possible. For example, you could reduce unnecessary calls or optimize resource-intensive operations.
9. Monitor X-Ray Costs:
   • Keep an eye on the cost of using X-Ray, especially if you increase the sampling rate. Consider setting up billing alerts to be notified if costs exceed a certain threshold.
10. Consider Other Tracing Solutions:
    • Depending on your requirements, you may want to consider other tracing solutions that may offer different sampling options or pricing models.

Remember that increasing the sampling rate will provide more detailed tracing information but will also increase the cost and load on your application. Therefore, it's important to find a balance that meets your operational and cost requirements.