Redis: Do You Really Need It?

Over a decade and three companies, the author observed a recurring pattern: Redis was frequently overused. Even at Tantan, a high-performance database system, Redis, initially intended to cache a small amount of user interaction count data, proved unnecessary. It could be efficiently stored directly in PostgreSQL without added complexity. Similar unnecessary Redis implementations were found in two other companies, adding complexity to low-load systems without significant performance gains. The author advocates for careful evaluation of new technologies, avoiding 'tech for tech's sake', and opting for simpler, reliable alternatives.