[fduran]

Thanks, pot capacity being scheduled differently would explain the behavior.

Almost all my ec2 instances are spot, and actually I can compare the distribution with the on-demand ones.

My spot instances are very short lived (15-30 mins max) and AFAIK I've never seen a spot instance force-terminated (this would be hard to find I think).

[paranoidrobot]

When I say "force-terminated" I mean when you don't voluntarily shut down in response to a SpotInterruption event.

When the event is sent, they give you two minutes to shut down.

If you either don't subscribe to the events, or don't shut down fast enough, they kill the instance.