SOA-C02 · Question #401
Users are periodically experiencing slow response times from a relational database. The database runs on a burstable Amazon EC2 instance with a 350 GB General Purpose SSD (gp2) Amazon Elastic Block…
The correct answer is D. Activate unlimited mode on the EC2 instance. A burstable performance instance configured as unlimited can sustain high CPU utilization for any period of time whenever required. The hourly instance price automatically covers all CPU usage spikes if the average CPU utilization of the instance is at or below the baseline…
Question
Users are periodically experiencing slow response times from a relational database. The database runs on a burstable Amazon EC2 instance with a 350 GB General Purpose SSD (gp2) Amazon Elastic Block Store (Amazon EBS) volume. A SysOps administrator monitors the EC2 instance in Amazon CloudWatch and observes that the VolumeReadOps metric drops to less than 10% of its peak value during the periods of slow response. What should the SysOps administrator do to ensure consistently high performance?
Options
- AConvert the gp2 volume to a General Purpose SSD (gp3) EBS volume.
- BConvert the gp2 volume to a Cold HDD (sc1) EBS volume.
- CConvert the EC2 instance to a memory optimized instance type.
- DActivate unlimited mode on the EC2 instance.
How the community answered
(24 responses)- A17% (4)
- B8% (2)
- C4% (1)
- D71% (17)
Explanation
A burstable performance instance configured as unlimited can sustain high CPU utilization for any period of time whenever required. The hourly instance price automatically covers all CPU usage spikes if the average CPU utilization of the instance is at or below the baseline over a rolling 24- hour period or the instance lifetime, whichever is shorter. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/burstable-performance-instances- unlimited-mode.html
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