We used quite a few system views in this recipe. Please use the following URLs to view the PostgreSQL documentation, which provides further details regarding statistic tables and system catalogs:
- The Statistics collector: https://www.postgresql.org/docs/current/static/monitoring-stats.html
- pg_stat_statements: https://www.postgresql.org/docs/current/static/pgstatstatements.html
- pg_class: https://www.postgresql.org/docs/current/static/catalog-pg-class.html