PostgreSQL's DateStyle parameter does two unrelated things at once, which explains why it confuses everyone.

PostgreSQL's query planner gathers statistics one way; Oracle, Db2, MySQL, SQLite, DuckDB, and Snowflake each chose differently.

PostgreSQL's fsync() assumption once broke silently across every database in the world. Here's the scar tissue, and why crashing is the safe option.

PostgreSQL 11 lets you create a data directory with group read access (0750) instead of owner-only (0700), enabling unprivileged backup processes to copy files…

PostgreSQL solves a bootstrapping puzzle with `data_directory`: how to find the config file before knowing where the data lives.

A read-only preset, like block_size — SHOW data_checksums tells you whether the cluster has page checksums, and that’s the only interaction the GUC offers. But

The planner assumes cursors fetch only 10% of results by default. If you're actually reading them all, that fast-start bias could be killing your performance.

PostgreSQL 16 overhauled role management to tame the near-superuser power of CREATEROLE.

Azure's managed PostgreSQL differs from competitors by putting the standby in the commit path—every write waits for synchronous replication to a second server…

cpu_tuple_cost, cpu_index_tuple_cost, and cpu_operator_cost are three of the constants the planner uses to price a query, and the single most useful thing to kn