Postgres tells you how many times each index was scanned. It can't tell you which one the planner picked for your slow query. I built a 3-file analyzer — and the first run found 20 of 51 indexes never used, 78% of my index disk wasted.
When I first started learning backend development, the database question came up almost immediately. Everyone has an opinion. SQL people will tell you it is the only correct way to store data. NoSQL people will tell you SQL is legacy thinking.…
In Week 2, I shifted focus from high-level scalability concepts to how data is actually stored, retrieved, and optimized in real systems. The main goals this week were to: Build intuition around storage engines and access patterns Understand SQL vs NoSQL…
At The Money: Looking Beyond Market Cap Weighted Indexes (April 22, 2026) Cap weighted indexes have come to dominate ETFs. Is it time for investors to consider a strategy based on fundamental weightings, such as profits or revenue growth?…