Primero, la configuración no es consistente ya que máximo
Si los grupos funcionan, debería ver 10 conexiones ESTABLECIDAS al puerto 3306 (o mssql 1433 en el ejemplo a continuación).
Usando
Usando hibernate.hikari.maximumPoolSize=10
hibernate.hikari.minimumIdle=10
lsof -nP -i :1433 -sTCP:ESTABLISHED
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 1596 lmc 260u IPv6 1624799 0t0 TCP 127.0.0.1:43022->127.0.0.1:1433 (ESTABLISHED)
java 1596 lmc 265u IPv6 1626072 0t0 TCP 127.0.0.1:43026->127.0.0.1:1433 (ESTABLISHED)
java 1596 lmc 266u IPv6 1630933 0t0 TCP 127.0.0.1:43030->127.0.0.1:1433 (ESTABLISHED)
java 1596 lmc 267u IPv6 1631705 0t0 TCP 127.0.0.1:43034->127.0.0.1:1433 (ESTABLISHED)
java 1596 lmc 268u IPv6 1632268 0t0 TCP 127.0.0.1:43038->127.0.0.1:1433 (ESTABLISHED)
java 1596 lmc 269u IPv6 1632273 0t0 TCP 127.0.0.1:43042->127.0.0.1:1433 (ESTABLISHED)
java 1596 lmc 270u IPv6 1632278 0t0 TCP 127.0.0.1:43046->127.0.0.1:1433 (ESTABLISHED)
ss (estadísticas de socket)ss -46 -np state established dport = :1433 | grep 'java' | sort -r -k 3,3 | nl
1 tcp 0 0 [::ffff:127.0.0.1]:43158 [::ffff:127.0.0.1]:1433 users:(("java",pid=1596,fd=273))
2 tcp 0 0 [::ffff:127.0.0.1]:43154 [::ffff:127.0.0.1]:1433 users:(("java",pid=1596,fd=272))
3 tcp 0 0 [::ffff:127.0.0.1]:43150 [::ffff:127.0.0.1]:1433 users:(("java",pid=1596,fd=271))
4 tcp 0 0 [::ffff:127.0.0.1]:43142 [::ffff:127.0.0.1]:1433 users:(("java",pid=1596,fd=270))
5 tcp 0 0 [::ffff:127.0.0.1]:43138 [::ffff:127.0.0.1]:1433 users:(("java",pid=1596,fd=269))
6 tcp 0 0 [::ffff:127.0.0.1]:43134 [::ffff:127.0.0.1]:1433 users:(("java",pid=1596,fd=268))
7 tcp 0 0 [::ffff:127.0.0.1]:43130 [::ffff:127.0.0.1]:1433 users:(("java",pid=1596,fd=267))
8 tcp 0 0 [::ffff:127.0.0.1]:43126 [::ffff:127.0.0.1]:1433 users:(("java",pid=1596,fd=266))
9 tcp 0 0 [::ffff:127.0.0.1]:43122 [::ffff:127.0.0.1]:1433 users:(("java",pid=1596,fd=265))
10 tcp 0 0 [::ffff:127.0.0.1]:43118 [::ffff:127.0.0.1]:1433 users:(("java",pid=1596,fd=260))
netstat (en desuso en algunas distribuciones a favor de ss )netstat -ant | grep 3306
tcp 0 0 127.0.0.1:41722 127.0.0.1:3306 ESTABLISHED
tcp 0 0 127.0.0.1:41730 127.0.0.1:3306 ESTABLISHED
tcp 0 0 127.0.0.1:41728 127.0.0.1:3306 ESTABLISHED
tcp 0 0 127.0.0.1:41726 127.0.0.1:3306 ESTABLISHED
tcp 0 0 127.0.0.1:41716 127.0.0.1:3306 ESTABLISHED
tcp 0 0 127.0.0.1:41732 127.0.0.1:3306 ESTABLISHED
tcp 0 0 127.0.0.1:41720 127.0.0.1:3306 ESTABLISHED
tcp 0 0 127.0.0.1:41736 127.0.0.1:3306 ESTABLISHED
tcp 0 0 127.0.0.1:41718 127.0.0.1:3306 ESTABLISHED
tcp 0 0 127.0.0.1:41724 127.0.0.1:3306 ESTABLISHED
