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BAEL-2456 Hibernate Query Plan Cache

This commit is contained in:
Raghav Jha 2019-02-05 17:45:51 +05:30
parent ff01e708c9
commit 998e0a5b81
3 changed files with 115 additions and 109 deletions
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13
persistence-modules/hibernate5/pom.xml
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@ -74,9 +74,14 @@
<version>${hibernate.version}</version>
</dependency>
<dependency>
<groupId>io.dropwizard.metrics</groupId>
<artifactId>metrics-core</artifactId>
<version>${dropwizard-metrics.version}</version>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-core</artifactId>
<version>${openjdk-jmh.version}</version>
</dependency>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-generator-annprocess</artifactId>
<version>${openjdk-jmh.version}</version>
</dependency>
</dependencies>
@ -97,7 +102,7 @@
<h2database.version>1.4.196</h2database.version>
<assertj-core.version>3.8.0</assertj-core.version>
<jackson.version>2.9.7</jackson.version>
<dropwizard-metrics.version>4.0.5</dropwizard-metrics.version>
<openjdk-jmh.version>1.21</openjdk-jmh.version>
</properties>
</project>

106
persistence-modules/hibernate5/src/test/java/com/baeldung/hibernate/queryplancache/QueryPlanCacheBenchmark.java Normal file
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@ -0,0 +1,106 @@
package com.baeldung.hibernate.queryplancache;
import com.baeldung.hibernate.HibernateUtil;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.jpa.QueryHints;
import org.hibernate.query.Query;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.TearDown;
import org.openjdk.jmh.annotations.Warmup;
import org.openjdk.jmh.infra.Blackhole;
import org.openjdk.jmh.runner.RunnerException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.Properties;
import java.util.concurrent.TimeUnit;
public class QueryPlanCacheBenchmark {
private static final Logger LOGGER = LoggerFactory.getLogger(QueryPlanCacheBenchmark.class);
@State(Scope.Thread)
public static class QueryPlanCacheBenchMarkState {
@Param({"1", "2", "3"})
public int planCacheSize;
public Session session;
@Setup
public void stateSetup() throws IOException {
LOGGER.info("State - Setup");
session = initSession(planCacheSize);
LOGGER.info("State - Setup Complete");
}
private Session initSession(int planCacheSize) throws IOException {
Properties properties = HibernateUtil.getProperties();
properties.put("hibernate.query.plan_cache_max_size", planCacheSize);
properties.put("hibernate.query.plan_parameter_metadata_max_size", planCacheSize);
SessionFactory sessionFactory = HibernateUtil.getSessionFactoryByProperties(properties);
return sessionFactory.openSession();
}
@TearDown
public void tearDownState() {
LOGGER.info("State - Teardown");
SessionFactory sessionFactory = session.getSessionFactory();
session.close();
sessionFactory.close();
LOGGER.info("State - Teardown complete");
}
}
@Benchmark
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.MICROSECONDS)
@Fork(1)
@Warmup(iterations = 2)
@Measurement(iterations = 5)
public void givenQueryPlanCacheSize_thenCompileQueries(QueryPlanCacheBenchMarkState state, Blackhole blackhole) {
Query query1 = findEmployeesByDepartmentNameQuery(state.session);
Query query2 = findEmployeesByDesignationQuery(state.session);
Query query3 = findDepartmentOfAnEmployeeQuery(state.session);
blackhole.consume(query1);
blackhole.consume(query2);
blackhole.consume(query3);
}
private Query findEmployeesByDepartmentNameQuery(Session session) {
return session.createQuery("SELECT e FROM DeptEmployee e " +
"JOIN e.department WHERE e.department.name = :deptName")
.setMaxResults(30)
.setHint(QueryHints.HINT_FETCH_SIZE, 30);
}
private Query findEmployeesByDesignationQuery(Session session) {
return session.createQuery("SELECT e FROM DeptEmployee e " +
"WHERE e.title = :designation")
.setHint(QueryHints.SPEC_HINT_TIMEOUT, 1000);
}
private Query findDepartmentOfAnEmployeeQuery(Session session) {
return session.createQuery("SELECT e.department FROM DeptEmployee e " +
"JOIN e.department WHERE e.employeeNumber = :empId");
}
public static void main(String... args) throws IOException, RunnerException {
//main-class to run the benchmark
org.openjdk.jmh.Main.main(args);
}
}

105
persistence-modules/hibernate5/src/test/java/com/baeldung/hibernate/queryplancache/QueryPlanCacheUnitTest.java
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@ -1,105 +0,0 @@
package com.baeldung.hibernate.queryplancache;
import com.baeldung.hibernate.HibernateUtil;
import com.codahale.metrics.Timer;
import com.codahale.metrics.UniformReservoir;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.jpa.QueryHints;
import org.hibernate.query.Query;
import org.junit.Ignore;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import java.util.concurrent.TimeUnit;
@RunWith(Parameterized.class)
public class QueryPlanCacheUnitTest {
private static final Logger LOGGER = LoggerFactory.getLogger(QueryPlanCacheUnitTest.class);
@Parameterized.Parameters
public static List<Integer[]> planCacheSize() {
List<Integer[]> planCacheSizes = new ArrayList<>();
planCacheSizes.add(new Integer[]{1});
planCacheSizes.add(new Integer[]{2});
planCacheSizes.add(new Integer[]{3});
return planCacheSizes;
}
private Timer timer = new Timer(new UniformReservoir(9900));
private int planCacheSize;
public QueryPlanCacheUnitTest(int planCacheSize) {
this.planCacheSize = planCacheSize;
}
@Test
@Ignore
public void givenQueryPlanCacheSize_thenCompileQueries() throws IOException {
Session session = initSession();
//warm-up
for (int i = 0; i < 9900; i++) {
createFindEmployeesByDepartmentNameQuery(session);
createFindEmployeesByDesignationQuery(session);
createFindDepartmentOfAnEmployeeQuery(session);
}
for (int i = 0; i < 3300; i++) {
long startTime = System.nanoTime();
createFindEmployeesByDepartmentNameQuery(session);
timer.update(System.nanoTime() - startTime, TimeUnit.NANOSECONDS);
startTime = System.nanoTime();
createFindEmployeesByDesignationQuery(session);
timer.update(System.nanoTime() - startTime, TimeUnit.NANOSECONDS);
startTime = System.nanoTime();
createFindDepartmentOfAnEmployeeQuery(session);
timer.update(System.nanoTime() - startTime, TimeUnit.NANOSECONDS);
}
LOGGER.info("Query Plan Cache Size - {}, Time(Nanoseconds) - {}", planCacheSize, timer.getSnapshot().get95thPercentile());
}
private Session initSession() throws IOException {
Properties properties = HibernateUtil.getProperties();
properties.put("hibernate.query.plan_cache_max_size", planCacheSize);
properties.put("hibernate.query.plan_parameter_metadata_max_size", planCacheSize);
SessionFactory sessionFactory = HibernateUtil.getSessionFactoryByProperties(properties);
return sessionFactory.openSession();
}
private Query createFindEmployeesByDepartmentNameQuery(Session session) {
return session.createQuery("SELECT e FROM DeptEmployee e " +
"JOIN e.department WHERE e.department.name = :deptName")
.setMaxResults(30)
.setHint(QueryHints.HINT_FETCH_SIZE, 30);
}
private Query createFindEmployeesByDesignationQuery(Session session) {
return session.createQuery("SELECT e FROM DeptEmployee e " +
"WHERE e.title = :designation")
.setHint(QueryHints.SPEC_HINT_TIMEOUT, 1000);
}
private Query createFindDepartmentOfAnEmployeeQuery(Session session) {
return session.createQuery("SELECT e.department FROM DeptEmployee e " +
"JOIN e.department WHERE e.employeeNumber = :empId");
}
}