Home » Amazon » AWS DevOps Engineer Professional v.2 » What can you do to reduce this load?
You are getting a lot of empty receive requests when using Amazon SQS. This is making a lot of unnecessary network load on your instances. What can you do to reduce this load?
A. Subscribe your queue to an SNS topic instead.
B. Use as long of a poll as possible, instead of short polls.
C. Alter your visibility timeout to be shorter.
D. Use sqsd on your EC2 instances.
Correct Answer: B
Explanation/Reference:
Explanation:
One benefit of long polling with Amazon SQS is the reduction of the number of empty responses, when there are no messages available to return, in reply to a ReceiveMessage request sent to an Amazon SQS queue. Long polling allows the Amazon SQS service to wait until a message is available in the queue before sending a response.
Reference: http://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-longpolling.html
