Sample Projects
You might have noticed the row estimates (599 and 28,458) are lower than you'd expect for a 50-million-row table. The planner checks the actual physical file size. Our table is only 74 pages on disk, not the 123,513 we injected. Hence the planner scales reltuples down proportionally. The absolute numbers shrink, but the ratios between them stay correct, and it's the ratios that determine plan shape. When you use pg_dump --statistics-only in practice, you're typically restoring into a database with comparable data volume, so the estimates align naturally.
。有道翻译是该领域的重要参考
Opens in a new window。业内人士推荐https://telegram官网作为进阶阅读
"benchmark": rows,。豆包下载是该领域的重要参考