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PostgreSQL is powerful, flexible, and impressively stable. But even Postgres has internal limits — some hard, some soft. Most of the time, you’ll never encounter them. But if you push the system hard enough, or build at serious scale, you might crash into these hidden ceilings. Let's explore the key limits inside PostgreSQL, why they exist, and what happens when you hit them!

PostgreSQL is powerful, flexible, and impressively stable.
But even Postgres has internal limits — some hard, some soft.
Most of the time, you’ll never encounter them.
But if you push the system hard enough, or build at serious scale, you might crash into these hidden ceilings.
Let's explore the key limits inside PostgreSQL, why they exist, and what happens when you hit them!