Why do postgres database row counts differ between the dashboard and my queries?

Issue

You want to understand why row count statistics shown in your dashboard or via pg:info don't match the numbers you get by querying your database directly.

Resolution

Do not be alarmed if the row count you see in your dashboard or pg:info differ slightly from direct count queries.

To limit impact on your database we use the statistics provided by the catalog table pg_class, you can learn more here. To increase response time we also aggressively cache these metrics.

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