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In Amazon SQS, the Receive Message Wait Time is a critical configuration that determines how your application polls for messages. Choosing the right value can be the difference between a high AWS bill with empty responses and a cost-efficient, high-performance system.
What is Short Polling?
By default, when you ask SQS for messages, it uses Short Polling. SQS samples a subset of its servers and returns a response immediately. If no messages are found in that subset, you get an empty response—even if there are messages elsewhere in the queue!
The Power of Long Polling
When you set the Receive Message Wait Time to a value greater than 0 (up to 20 seconds), you enable Long Polling. SQS will wait for a message to arrive before sending a response. This significantly reduces the number of empty responses and lowers your costs.
Key Benefits
- Reduce Costs: Fewer API calls mean fewer billable requests.
- Eliminate Empty Responses: Only receive data when messages are actually available.
- Lower Latency: Messages are sent to your consumer as soon as they become available in the queue.
Conclusion
Setting your Receive Message Wait Time is one of the simplest ways to optimize your SQS architecture. For most production workloads, Long Polling is the recommended approach to balance cost and performance. Watch the full tutorial above to see how to configure these settings in the AWS Console!
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