PLAIN SPRING BOOT HEAP IS AROUND = 21 to 25 mb Ten million row (10,000,000) Table Size - 1569 MB Used 7,548,047,136 B 7.5 GB -Xlog:gc* log of GC IMP : https://spring.io/blog/2015/12/10/spring-boot-memory-performance MORE Query Plan Cache : https://thorben-janssen.com/hibernate-query-plan-cache/