Cross-engine SQL guidance beyond textbook fundamentals: the GitLab 2017 backup-failure postmortem, why REPEATABLE READ silently permits write skew, sourced connection-pool sizing formulas, and SQL:2023's JSON type and pr...
Production guidance for MongoDB covering embedding vs referencing schema design, compound indexing and index intersection limits, the aggregation pipeline, multi-document transaction costs, and when a document store beat...
Production-oriented PostgreSQL guidance covering specialized index types (GIN, GiST, BRIN, hash), JSONB modeling, table partitioning, connection pooling, autovacuum tuning, and logical replication.
Production guidance for Redis covering core data structure selection, caching patterns (cache-aside, write-through), eviction policies, RDB vs AOF persistence trade-offs, pub/sub vs streams, and Redis Cluster fundamental...