Everyone knows that indexes make databases faster, well not everyone as I once came across a team that wouldn’t apply « complex indexes »; which for them was an index with more than one column, but you get the point. Indexes are great, but they can also make your databases slower and more expensive to operate. Various use cases can cause different issues, and there’s always the worry that removing something intended to speed up your database could be a mistake.
Over time, even well-maintained systems suffer from performance degradation due to overlooked indexing issues. Resolving these can simultaneously boost the performance