Amazon Linux EC2 Troubleshooting

My Amazon Linux EC2 instance is showing signs of stress—occasional service crashes and noticeable load spikes. The stack is Nginx in front of PHP-FPM, and everything sits on a vanilla AWS setup with the usual security groups and EBS volumes... (Budget: ₹100 - ₹110 INR, Jobs: Amazon Web Services, Apache, DevOps, Linux, Nginx, Performance Tuning, System Admin, System Administration)