[ tomcat ] Springboot의 내장 tomcat db connection pool 수치조정

application.properties파일에 아래 라인을 추가하여 max connection수치를 조정한다.

spring.datasource.maxActive=5

https://stackoverflow.com/questions/25573034/spring-boot-how-do-i-set-jdbc-pool-properties-like-maximum-number-of-connection
https://engkimbs.tistory.com/755