Topic 1 Question 674

AWS Certified Solutions Architect - Associate

Topic 1 Question 674
A company runs a web application on Amazon EC2 instances in an Auto Scaling group. The application uses a database that runs on an Amazon RDS for PostgreSQL DB instance. The application performs slowly when traffic increases. The database experiences a heavy read load during periods of high traffic.

Which actions should a solutions architect take to resolve these performance issues?

2 つ選択
- Turn on auto scaling for the DB instance.
- Create a read replica for the DB instance. Configure the application to send read traffic to the read replica.
- Convert the DB instance to a Multi-AZ DB instance deployment. Configure the application to send read traffic to the standby DB instance.
- Create an Amazon ElastiCache cluster. Configure the application to cache query results in the ElastiCache cluster.
- Configure the Auto Scaling group subnets to ensure that the EC2 instances are provisioned in the same Availability Zone as the DB instance.
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- 正解だと思う選択肢: BD
  B. Create a read replica for the DB instance. Configure the application to send read traffic to the read replica.
  
  By creating a read replica, you offload read traffic from the primary DB instance to the replica, distributing the load and improving overall performance during periods of heavy read traffic. D. Create an Amazon ElastiCache cluster. Configure the application to cache query results in the ElastiCache cluster.
  
  Amazon ElastiCache can be used to cache frequently accessed data, reducing the load on the database. This is particularly effective for read-heavy workloads, as it allows the application to retrieve data from the cache rather than making repeated database queries.
  
  👍 4
  meenkaza2023/12/29
- 正解だと思う選択肢: AB
  A and B should be most correct ans
  
  👍 3
  Riajul2023/12/29
- 正解だと思う選択肢: BD
  Not A - There is no such thing as "auto scaling for a DB instance". There is automatic storage scaling, but storage is not the issue here. B - Yes, read replica will help with "heavy read load" Not C - "send read traffic to the standby DB instance" does not work D - "Configure the application ..." might be a bit simplified, but Elasticache helps with read load Not E - That might have impact on latency, but not on database load; and all instances in same AZ would be against WAF
  
  👍 3
  pentium752024/01/03
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