We are recently seeing high EC2-Other cost, specifically “InterZone-In” costs. It started after making some infra changes (not sure if both could be related)

Our infra change is that we moved from dedicated cluster to shared cluster and instead of using a maximum of 12 m5a.large we are now using at max 5 m5a.2xlarge.

I understand that high Interzone-in cost implies data transfer has increased betweeen different AZs. However, do you have some guidelines on how we can get more details as to what has caused the increase in this cost (like what data transfer or between which AZs ).

Thank you