You have a WordPress site hosted on EC2 with a MySQL database hosted on RDS. The majority of your traffic is read traffic. There is only write traffic when you create a new blog. One of your blogs has gone viral and your WordPress site is struggling to cope. You check your CloudWatch metrics and notice your RDS instance is at 100% CPU utilization. What two steps should you take to reduce the CPU utilization?

B. and D.

Explanation:

Based on the information provided it can be said that there are a couple things that can be done in order to reduce CPU utilization. First you can create an ElastiCache cluster and use this to cache your most frequently read blog posts, which will free up unnecessarily used space. Secondly you can create multiple RDS read replicas and point multiple EC2 instances to these read replicas, thereby spreading the load, which will prevent a single instance from taking the whole load.

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(a) oldest