Understanding query performance patterns is essentially the foundation for query performance tuning. It, in many ways, dictates how a database cluster evolves. And then there are obviously direct and indirect cost connotations as well. PostgreSQL provides very detailed statistics through a number of catalog views and extensions that can be easily added to provide more [&]

https://www.percona.com/blog/improve-postgresql-query-performance-insights-with-pg_stat_monitor/