Spring Data JPA Is Too Slow

Question

I recently switched my app to Spring Boot 2. I rely on Spring Data JPA to handle all transactions and I noticed a huge speed difference between this and my old configuration. Storing around 1000 elements was being done in around 6s and now it's taking over 25 seconds. I have seen SO posts about batching with Data JPA but none of these worked.

Let me show you the 2 configurations:

The entity (common to both) :

    @Entity
    @Table(name = "category")
    public class CategoryDB implements Serializable
    {
        private static final long serialVersionUID = -7047292240228252349L;

        @Id
        @Column(name = "category_id", length = 24)
        private String category_id;

        @Column(name = "category_name", length = 50)
        private String name;

        @Column(name = "category_plural_name", length = 50)
        private String pluralName;

        @Column(name = "url_icon", length = 200)
        private String url;

        @Column(name = "parent_category", length = 24)
        @JoinColumn(name = "parent_category", referencedColumnName = "category_id")
        private String parentID;

        //Getters & Setters

     }

Old Repository (showing an insert only) :

@Override
    public Set<String> insert(Set<CategoryDB> element)
    {
        Set<String> ids = new HashSet<>();
        Transaction tx = session.beginTransaction();
        for (CategoryDB category : element)
        {
            String id = (String) session.save(category);
            ids.add(id);
        }
        tx.commit();
        return ids;
    }

Old Hibernate XML Config File:

    <property name="show_sql">true</property>
    <property name="format_sql">true</property>

    <!-- connection information -->
    <property name="hibernate.connection.driver_class">com.mysql.cj.jdbc.Driver</property>
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>

    <!-- database pooling information -->
    <property name="connection_provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>
    <property name="hibernate.c3p0.min_size">5</property>
    <property name="hibernate.c3p0.max_size">100</property>
    <property name="hibernate.c3p0.timeout">300</property>
    <property name="hibernate.c3p0.max_statements">50</property>
    <property name="hibernate.c3p0.idle_test_period">3000</property>

Old Statistics:

18949156 nanoseconds spent acquiring 2 JDBC connections;
5025322 nanoseconds spent releasing 2 JDBC connections;
33116643 nanoseconds spent preparing 942 JDBC statements;
3185229893 nanoseconds spent executing 942 JDBC statements;
0 nanoseconds spent executing 0 JDBC batches;
0 nanoseconds spent performing 0 L2C puts;
0 nanoseconds spent performing 0 L2C hits;
0 nanoseconds spent performing 0 L2C misses;
3374152568 nanoseconds spent executing 1 flushes (flushing a total of 941 entities and 0 collections);
6485 nanoseconds spent executing 1 partial-flushes (flushing a total of 0 entities and 0 collections)

New Repository:

@Repository
public interface CategoryRepository extends JpaRepository<CategoryDB,String>
{
    @Query("SELECT cat.parentID FROM CategoryDB cat WHERE cat.category_id = :#{#category.category_id}")
    String getParentID(@Param("category") CategoryDB category);
}

And I'm using the saveAll() in my service.

New application.properties:

spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

spring.datasource.hikari.connection-timeout=6000
spring.datasource.hikari.maximum-pool-size=10

spring.jpa.properties.hibernate.show_sql=true
spring.jpa.properties.hibernate.format_sql=true
spring.jpa.properties.hibernate.generate_statistics = true
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQLDialect
spring.jpa.properties.hibernate.jdbc.batch_size=50
spring.jpa.properties.hibernate.order_inserts=true

New Statistics:

24543605 nanoseconds spent acquiring 1 JDBC connections;
0 nanoseconds spent releasing 0 JDBC connections;
136919170 nanoseconds spent preparing 942 JDBC statements;
5457451561 nanoseconds spent executing 941 JDBC statements;
19985781508 nanoseconds spent executing 19 JDBC batches;
0 nanoseconds spent performing 0 L2C puts;
0 nanoseconds spent performing 0 L2C hits;
0 nanoseconds spent performing 0 L2C misses;
20256178886 nanoseconds spent executing 3 flushes (flushing a total of 2823 entities and 0 collections);
0 nanoseconds spent executing 0 partial-flushes (flushing a total of 0 entities and 0 collections)

Probably , I'm misconfiguring something on behalf on Spring. This is a huge performance difference and I'm on a dead end. Any hints on what is going wrong here are very appreciated.

Answer 1

You can use jdbc template directly it is much fast than data jpa.