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An eCommerce application consists of three tiers. The web tier includes EC2 instances behind an Application Load balancer, the middle tier uses EC2 instances and an Amazon SQS queue to process orders, and the database tier consists of an Auto Scaling DynamoDB table. During busy periods customers have complained about delays in the processing of orders. A Solutions Architect has been tasked with reducing processing times. Which action will be MOST effective in accomplishing this requirement?