Do connection pools shrink with idle connections?

Hi,

I launched my migration to boost mysql recently and I noticed that once the connection count gets to the maximum, the "threads connected" metric in the MySql server doesn't go down. Does that mean that the connection pool never shrinks? Or did I miss something?

Thanks in advance!

The issue names no file, test, or entry point. Start by investigating Boost.MySQL connection-pool behavior and how MySQL reports the “threads connected” metric; done means determining and documenting whether idle connections are released or retained.

Written by the indexing model from the issue text.