Gas prices soar and oil jumps as Iran war pushes down global stock markets

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Delegation flows up and down the org chart automatically.

"Hi [person], I am working on [project] and have done [steps 1-3].

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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.,更多细节参见wps

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黄磊,专栏作家,多年从业经验,致力于为读者提供专业、客观的行业解读。