dineshbhagat / Spring-boot-JPA-Two-Level-Cache

Spring-boot-JPA-Two-Level-Cache

Ref:

• https://dzone.com/articles/all-about-hibernate-second
• https://javarevisited.blogspot.com/2017/03/difference-between-first-and-second-level-cache-in-Hibernate.html

Check the first request trace:

First Request

curl -k 'http://localhost:8080/article/1'

Duration:213.689ms Services:2 Depth:2 Total Spans:15

Flow:

Key	Value
http.method	GET
http.path	/article/1
mvc.controller.class	ArticleCommentController
mvc.controller.method	getArticle
sql.query	select 1
sql.query	set session transaction read only
sql.query	SET autocommit=0
sql.query	select article0_.id as id1_0_0_, article0_.article_text as article_2_0_0_ from article article0_ where article0_.id=1
sql.query	commit
sql.query	SET autocommit=1
sql.query	set session transaction read write
sql.query	set session transaction read only
sql.query	SET autocommit=0
sql.query	commit
sql.query	SET autocommit=1
sql.query	set session transaction read write
sql.query	select comments0_.article_id as article_4_2_0_, comments0_.id as id1_2_0_, comments0_.id as id1_2_1_, comments0_.article_id as article_4_2_1_, comments0_.created_at as created_2_2_1_, comments0_.comment_str as comment_3_2_1_, comments0_.user_id as user_id5_2_1_ from comment comments0_ where comments0_.article_id=1
sql.query	select user0_.id as id1_6_0_, user0_.date_of_birth as date_of_2_6_0_, user0_.full_name as full_nam3_6_0_ from user user0_ where user0_.id=1

Second Request

curl -k 'http://localhost:8080/article/1'

Duration: 19.206ms Services:2 Depth:2 Total Spans:7
Approx 10 times improvement in response time

Flow:

Key	Value
http.method	GET
http.path	/article/1
mvc.controller.class	ArticleCommentController
mvc.controller.method	getArticle
sql.query	select 1
sql.query	set session transaction read only
sql.query	SET autocommit=0
sql.query	commit
sql.query	SET autocommit=1
sql.query	set session transaction read write