While image optimization and caching are common web performance focus areas, a cluttered database significantly impacts dynamic and high-traffic websites. WordPress relies on database queries for every page load, and an unoptimized database slows down Time to First Byte regardless of CDN speed. Three crucial database-level optimizations include controlling post revisions. By default, WordPress stores all revisions indefinitely, contributing to a large database. Limiting post revisions to a specific number, like five, can be done by adding a line to wp-config.php. Another critical task is purging expired transients. Transients cache API calls and query results but are not always automatically cleaned up, leading to orphaned rows in the wp_options table. Routine purging of expired transients is essential. Finally, cleaning up wp_commentmeta and wp_usermeta tables is vital. Tables storing user behavior data or spam comment information can grow rapidly. Ensuring metadata is deleted when its parent comment or user is removed is a key practice. These database optimizations are part of a larger performance strategy. A comprehensive guide covers asset optimization and advanced caching for a complete picture. Users are encouraged to share their own hidden tricks for achieving fast TTFB on legacy WordPress sites.