m6a.24xlarge instance keep rebooting every 2 to 3 hours

Hello,

Did you check the status checks using CloudWatch metric? Is it failing instance/system status checks before reboot?

Have you checked the performance metrics like cpu, memory, network in and network out usage of the instance. Do you observe any resource crunch?

Have you checked the cloud trail logs. Are you able to view the “Rebootinstances” API call to check if the reboot is triggered from any scheduler?

Please refer the below link which addresses various causes that could trigger unexpected reboot: https://repost.aws/knowledge-center/ec2-instance-automatic-reboot-cause