Rate Limiting and Quota Metering in High-Load LLM Services: Technical Reflections on Stability

This article analyzes the technical challenges of rate limiting and quota metering in high-load Large Language Model (LLM) services. It explores the root causes of abnormal quota consumption and throttling from the perspectives of resource estimation, multi-step call chains, and statistical discrepancies. Furthermore, it outlines optimization strategies for call chain reduction, output control, and batch scheduling, alongside best practices for capacity evaluation and observability to ensure system stability and user trust.