Problematic Indexes
Indexes are one of the most powerful tools for improving query performance in SQL Server.When designed correctly they can dramatically reduce I/O, speed up queries, and improveapplication responsiveness. However, indexes are not free. Every index adds overhead to INSERT, UPDATE, and DELETEoperations, increases storage requirements, and must be maintained over time. Because of this, poorly configured, unused, or disabled indexes can create more harm thanbenefit. They consume storage, slow down write operations, and add unnecessary maintenancework without improving query performance. …