database connection pooling what's your default

Hey folks, I've been thinking a lot about database performance lately, specifically around connection pooling. It feels like a foundational piece, but I rarely see it discussed much. When you're setting up a new service or microservice, what's your go-to strategy for connection pooling? Are you usually sticking with the default settings provided by your framework or ORM, or do you have a more opinionated approach to initial pool size, max connections, and timeouts? Curious to hear what works for you and any pitfalls you've encountered.