The maximum pool size is a property that defines the upper limit of active and available connections in a database connection pool.
When the maximum number of connections is reached, subsequent requests are placed in a queue. If no connection becomes free before a specified timeout (often 15–30 seconds), the application throws an error (e.g., "Max pool size was reached"). 2. Common Default Values Defaults vary significantly by technology and vendor: Advanced Performance Topics - EF Core - Microsoft Learn
It prevents a single application from overwhelming the database server with too many requests, which can lead to system instability or crashes.
