使用Hibernate调用MySQL存储过程时的性能问题

Question

I'm trying to understand why the execution time of my stored procedure is so much higher when I run it from Java using Hibernate than when I run it directly in MySQL.

The stored procedure itself is responsible for moving 20000 rows from table A to table B and then delete them in table A.

Running the stored procedure in MySQL takes around 18 seconds.

In Java, I'm using Hibernate and create a query:

Query query =
    mainSession
        .createSQLQuery("{CALL my_stored_procedure(:maxResultSize)}")
        .setParameter("maxResultSize", maxResultSize);

Then the query is executed and the session is flushed and cleared:

List<BigInteger> rows = query.list();
mainSession.flush();
mainSession.clear();

This takes around 248 seconds.

Does anyone know why it takes so much more time to call the stored procedure from Java using Hibernate?

What approach should I take to increase the performance?

Answer 1

Please could you try with native query, it is faster for me and work well.

List<Object[]> query = (List<Object[]>) mySessionFactory.getCurrentSession()
                .createNativeQuery("{CALL my_stored_procedure(:maxResultSize)}")
        .setParameter("maxResultSize", maxResultSize).getResultList();