Async append lets the planner fan out queries across remote shards in parallel instead of one at a time, but it's a diagnostic switch, not a tuning knob.

Three PostgreSQL utilities merge into one package: advisory locks (now async), query-log silencing without race conditions, and session-scoped GUC control.

Generate valid SQL that looks real, nourishes nothing, and never spoils.

`effective_io_concurrency` has changed what it means twice—from a harmonic-series spindle count to a direct request depth to a real async I/O control.

Render the sky at any place and moment as a PNG gradient, with zero dependencies and pixel-perfect determinism.

effective_cache_size doesn't allocate memory, reserve RAM, or control runtime behavior—it merely whispers a number to the query planner to make it smarter…

Parallel queries in PostgreSQL need shared memory sized at runtime, not startup.

PostgreSQL 18 finally made extensions truly relocatable by adding `extension_control_path` to match the long-existing `dynamic_library_path`.

PostgreSQL's isolation levels hold surprises: read uncommitted silently becomes read committed, repeatable read forbids phantom reads the standard permits, and…

PostgreSQL's `DEFERRABLE` transaction mode only works with `SERIALIZABLE READ ONLY` transactions, where it waits for a safe snapshot to eliminate…