JPA saveAll is not inserting in two tables in batch and very slow

Question

I am using spring JPA/hibernate to insert data into postgres database. Actually I need to insert records into two tables I have below Entity class

@Entity
@Table(name="TECHNOLOGY")
@SecondaryTable(name = "PERSON", 
                pkJoinColumns = @PrimaryKeyJoinColumn(name = "t_id"))
@Getter @Setter
public class TechEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "TID_SEQ")
    @SequenceGenerator(sequenceName = "t_id_seq", allocationSize = 1, name = "TID_SEQ")
    private int tId;
    private String tCode;
    private String tType;

    @Column(name = "name", table = "PERSON")
    private String name;

And I have saveAll method in my service class:

repo.saveAll(list);

I configured the below properties as well to increase performance but no improvements.

    spring.jpa.properties.hibernate.jdbc.batch_size = 200
    spring.jpa.properties.hibernate.order_inserts=true 
    spring.jpa.properties.hibernate.order_updates = true
    spring.jpa.properties.hibernate.jdbc.batch_versioned_data = true
    spring.jpa.properties.hibernate.id.optimizer.pooled.preferred = pooled-lo
    spring.jpa.properties.hibernate.generate_statistics=true

when trying to do insert 500-600 records, it is taking long time. Am I missing something? Can anyone please suggest, how can I improve performance. Thanks in advance.