If you encounter the error

Request Limit Exceeded

Why Does This Happen?

1. Prevent resource abuse.
   
2. Maintain service stability and performance.
   
3. Ensure equitable access for all users.
   

Common Causes of This Issue

1. Short Polling Intervals: When the interval between successive API requests is too short, it can lead to a high volume of requests in a short time, exceeding the allowed threshold.
   
2. Many Resources in the Same Region: When a large number of resources within the same AWS region are being accessed through API requests—whether from a third-party application, a command line tool, or the Amazon console—it can result in excessive API calls, quickly hitting the rate limit.
   

By identifying these causes, you can take necessary actions to optimize your API usage and avoid rate limit errors.

Suggestions to Mitigate This Issue

• Increase the Polling Interval: Configure a longer interval between successive API requests to reduce the overall request frequency. This helps in staying within the allowed rate limits set by AWS.
  
• Use Discovery Filters: Implement discovery regex filtering, to focus on monitoring only the critical resources that are essential for your operations. This reduces the number of API calls made to AWS.
  
• Enable API Rate Limiting to Reduce Throttling: If throttling issues are encountered, go to Settings → Performance Polling → Optimize Data Collection, select Amazon as the monitor type, choose Performance as the metric name, and check the box to enable rate limiting.

By implementing these suggestions, you can ensure better management of AWS API rate limits and maintain effective monitoring with Applications Manager.