Clojurians Log v2

is there a way to set the connection pool size for aleph's http-server?

You can pass an executor and configure that. It's controlling how threads are (not) created https://github.com/ztellman/aleph/blob/5457870cdba22bc3f30891a3b95f3e484b9d8a42/src/aleph/http/server.clj#L424