//
Search across all documentation pages
7 pages in this section.
How PostgreSQL's cost-based query planner turns table statistics into row estimates and plan choices, and why the planner is only ever as good as the statistics it reads.
Learn how PostgreSQL estimates selectivity using column histograms and distinct-value counts. Understand pg_stats content and its link to plan row estimates.
Learn when to manually run ANALYZE on PostgreSQL 18.4, even with Autoanalyze enabled, for bulk loads, migrations, and skewed tables.
Learn best practices for PostgreSQL statistics, including refresh cadences, optimizing depth and correlation, and operational safety for better query plans.
A single-page roundup of every highlight bullet from the 6 pages in the Statistics section, grouped by source page so you can scan all 36 takeaways without opening each article individually.