Amazon EC2 | Micro Instances Flashcards
Can I use stop or Hibernation interruption behaviors with Spot Fleet?
Micro Instances
Amazon EC2 | Compute
Yes, stop-start and hibernate-resume are supported with Spot Fleet with “maintain” fleet option enabled.
How much compute power do Micro instances provide?
Micro Instances
Amazon EC2 | Compute
Micro instances provide a small amount of consistent CPU resources and allow you to burst CPU capacity up to 2 ECUs when additional cycles are available. They are well suited for lower throughput applications and web sites that consume significant compute cycles periodically but very little CPU at other times for background processes, daemons, etc. Learn more about use of this instance type.
How does a Micro instance compare in compute power to a Standard Small instance?
Micro Instances
Amazon EC2 | Compute
At steady state, Micro instances receive a fraction of the compute resources that Small instances do. Therefore, if your application has compute-intensive or steady state needs we recommend using a Small instance (or larger, depending on your needs). However, Micro instances can periodically burst up to 2 ECUs (for short periods of time). This is double the number of ECUs available from a Standard Small instance. Therefore, if you have a relatively low throughput application or web site with an occasional need to consume significant compute cycles, we recommend using Micro instances.
How can I tell if an application needs more CPU resources than a Micro instance is providing?
Micro Instances
Amazon EC2 | Compute
The CloudWatch metric for CPU utilization will report 100% utilization if the instance bursts so much that it exceeds its available CPU resources during that CloudWatch monitored minute. CloudWatch reporting 100% CPU utilization is your signal that you should consider scaling – manually or via Auto Scaling – up to a larger instance type or scale out to multiple Micro instances.
