SQL Server Performance: Why Diagnosis Starts with the Problem

This article discusses the common challenge of diagnosing SQL Server performance issues, starting with the vague complaint 'SQL Server is slow.' It explains why 'slow' is not a diagnosis and how premature interpretation of metrics like CPU, storage, or missing indexes can lead to ineffective solutions. The author advocates for a methodical approach: first, clearly define the specific problem, affected queries, conditions, timing, and baseline before diving into technical analysis. The piece highlights how shared assumptions without verification can derail troubleshooting, and emphasizes that the real work begins with asking precise questions rather than relying on abundant but unfocused data. It is relevant to IT/technology professionals focused on database performance optimization.