DatabasesBackendHigh signal
Connection Pooling
Reusing a shared set of open database connections across requests instead of opening and closing a new one every time, which is slow and resource-heavy at scale.
Think of it like
Like a taxi stand keeping a few cars running and ready, instead of building a brand-new car from scratch for every single passenger.
Junior or senior?
Junior sounds like
Hasn't thought about how database connections get reused across requests.
Senior sounds like
Can describe a real incident where a connection pool was exhausted or misconfigured under load.
Ask them
“Have you ever had a database connection pool get exhausted under load? What caused it, and how did you fix it?”