t2.micro becomes slower and slower

Question

Hi !  
  
We're testing our application and found that t2.micro is able to run but with not heavy computation (about 30% CPU usage), after a whole night, the performance degenerated for about 5 times e.g. computation time for a unit costs 5 times more, and CPU usage became about 70%, so it's not stable at all, is there any tips on this behavior ? Thanks a lot.

Accepted Answer

Hello there  
  
Please note that t2.micro instances have 1 vCPU and baseline performance is 10% of this vCPU. So if workload burst more than 10% CPU usage, it will start consuming burst credits. Once this burst credits becomes 0, the CPU usage will be throttled at 10% baseline. This will be seen as slowness.   
  
Please refer https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/burstable-credits-baseline-concepts.html for more information.   
  
You can choose higher instance type or move to t2 unlimited option  
  
https://aws.amazon.com/blogs/aws/new-t2-unlimited-going-beyond-the-burst-with-high-performance/

t2.micro becomes slower and slower

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