High CPU usage in server-side tagging often occurs due to inefficient event processing or excessive simultaneous requests. This happens when the server processes too many tags per event, lacks proper batching of requests, or executes heavy computations without optimization.
Additionally, traffic spikes can overwhelm servers without autoscaling capabilities. To address this, review and streamline your tagging logic, eliminate unnecessary data processing, and use caching for repetitive tasks. Implement load balancers to distribute traffic across multiple servers, ensuring scalability. Leveraging autoscaling on cloud platforms like AWS or Google Cloud can further prevent server overload during peak times.