Stratum is a columnar SQL engine with git-like branching semantics and copy-on-write structural sharing that beats DuckDB on 35 of 46 single-threaded analytical benchmarks using Java Vector API SIMD execution. It enables zero-copy dataset forking, time-travel queries, and reproducible experiments without data duplication.
A deep dive into PostgreSQL memory management failures caused by work_mem misunderstandings: a single poorly-written query combining a plpgsql function with hash joins accumulated 2 TB of RAM because memory contexts are only released at query completion, not per-operation. The article explains root causes, introduces pg_log_backend_memory_contexts for debugging, and provides mitigation strategies including query rewrites and statement timeouts.