Furkan Turkoglu — BlogBlog posts on backend systems, PostgreSQL/pgvector hybrid search, and applied AI.https://portfolio.furkanturkoglu.workers.dev/en/en-usWhy vector similarity alone falls short: PostgreSQL FTS, pgvector, and RRFhttps://portfolio.furkanturkoglu.workers.dev/en/blog/hybrid-retrieval-postgresql-pgvector-rrf/https://portfolio.furkanturkoglu.workers.dev/en/blog/hybrid-retrieval-postgresql-pgvector-rrf/Why dense embeddings miss exact technical tokens, and how to fuse PostgreSQL full-text search with pgvector cosine similarity using RRF in SQL.Fri, 18 Sep 2026 00:00:00 GMTpostgresqlpgvectorretrievalragThe day I sped up a slow Postgres query by 40xhttps://portfolio.furkanturkoglu.workers.dev/en/blog/speeding-up-slow-postgres-query-40x/https://portfolio.furkanturkoglu.workers.dev/en/blog/speeding-up-slow-postgres-query-40x/Tracing high buffer reads in EXPLAIN ANALYZE and replacing a misordered index with a partial composite index to cut latency from 480ms to 11ms.Fri, 14 Aug 2026 00:00:00 GMTpostgresqlsqlperformance