Topic
PostgreSQLAdvancedExplains by mechanism where InnoDB or PostgreSQL does less work for lookups, updates, joins, connections and replication, then shows how to benchmark your own workload with pgbench and sysbench.
#internals#mvcc#performance
PostgreSQLIntermediateA reference comparison of PostgreSQL and MySQL: storage and MVCC, isolation defaults, DDL, data types, indexes, replication, licensing and tooling, with a decision summary.
#indexing#internals#replication
MySQLIntermediateStale reads and 2 a.m. lag spikes usually come down to single-threaded apply, tables without primary keys and giant transactions. Diagnose and fix each one.
#performance#replication#troubleshooting
