Фото: Ints Kalnins / Reuters
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.
Москвичей предупредили о резком похолодании09:45，推荐阅读新收录的资料获取更多信息
// Call exported functions。新收录的资料是该领域的重要参考
Последние новости。关于这个话题，新收录的资料提供了深入分析
近年来，亚虹医药在研发上投入不菲。2020年至2024年，公司累计研发投入已超过12亿元。