Vol. I · A Postgres Handbook

The Query & the Schema

A reading-room reference for writing PostgreSQL by hand — selects to window functions, with the schema in plain view.

IntermediateAdvanced PostgreSQL

PostgreSQL vs MySQL: Background writer (bgwriter)

The query

SQL
-- Q: How does Background writer (bgwriter) differ between PostgreSQL and MySQL?
-- A: While MySQL (InnoDB) handles this primarily via thread-based architecture,
-- PostgreSQL manages Background writer (bgwriter) through its robust object-relational model.
-- PostgreSQL's implementation is generally more standard-compliant but requires more manual tuning (e.g., autovacuum vs purge threads).
Tested against PostgreSQL 16

Note

“Interviewers love comparing MySQL and PostgreSQL on Background writer (bgwriter).