diff --git a/core/src/test/java/com/vladmihalcea/book/high_performance_java_persistence/jdbc/batch/generatedkeys/sequence/AbstractSequenceGeneratedKeysBatchPreparedStatementTest.java b/core/src/test/java/com/vladmihalcea/book/high_performance_java_persistence/jdbc/batch/generatedkeys/sequence/AbstractSequenceGeneratedKeysBatchPreparedStatementTest.java
index cdaa131..c8d43f2 100644
--- a/core/src/test/java/com/vladmihalcea/book/high_performance_java_persistence/jdbc/batch/generatedkeys/sequence/AbstractSequenceGeneratedKeysBatchPreparedStatementTest.java
+++ b/core/src/test/java/com/vladmihalcea/book/high_performance_java_persistence/jdbc/batch/generatedkeys/sequence/AbstractSequenceGeneratedKeysBatchPreparedStatementTest.java
@@ -3,18 +3,43 @@
 import com.vladmihalcea.book.high_performance_java_persistence.jdbc.batch.providers.SequenceBatchEntityProvider;
 import com.vladmihalcea.hibernate.masterclass.laboratory.util.AbstractTest;
 import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
 
 import java.sql.*;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
 
 /**
  * AbstractSequenceGeneratedKeysBatchPreparedStatementTest - Base class for testing JDBC PreparedStatement generated keys for Sequences
  *
  * @author Vlad Mihalcea
  */
+@RunWith(Parameterized.class)
 public abstract class AbstractSequenceGeneratedKeysBatchPreparedStatementTest extends AbstractTest {
 
     private SequenceBatchEntityProvider entityProvider = new SequenceBatchEntityProvider();
 
+    private int allocationSize = 1;
+
+    public AbstractSequenceGeneratedKeysBatchPreparedStatementTest(int allocationSize) {
+        this.allocationSize = allocationSize;
+    }
+
+    @Parameterized.Parameters
+    public static Collection<Integer[]> rdbmsDataSourceProvider() {
+        List<Integer[]> providers = new ArrayList<>();
+        providers.add(new Integer[]{1});
+        providers.add(new Integer[]{5});
+        providers.add(new Integer[]{10});
+        providers.add(new Integer[]{15});
+        providers.add(new Integer[]{20});
+        providers.add(new Integer[]{25});
+        return providers;
+    }
+
     @Override
     protected Class<?>[] entities() {
         return entityProvider.entities();
@@ -26,7 +51,7 @@ public void testBatch() {
     }
 
     protected int getPostCount() {
-        return 10;
+        return 5 * 1000;
     }
 
     protected int getBatchSize() {
@@ -34,7 +59,7 @@ protected int getBatchSize() {
     }
 
     protected int getAllocationSize() {
-        return 1;
+        return allocationSize;
     }
 
     protected void batchInsert(Connection connection) throws SQLException {
@@ -46,6 +71,8 @@ protected void batchInsert(Connection connection) throws SQLException {
 
         int count = 0;
 
+        long startNanos = System.nanoTime();
+
         try(PreparedStatement postStatement = connection.prepareStatement(
                 "insert into Post (id, title, version) " +
                 "values (?, ?, ?)")) {
@@ -61,7 +88,6 @@ protected void batchInsert(Connection connection) throws SQLException {
                             callSequenceSyntax())) {
                         resultSet.next();
                         id = resultSet.getLong(1);
-                        LOGGER.info("Generated id {}", id);
                     }
                 }
 
@@ -75,6 +101,12 @@ protected void batchInsert(Connection connection) throws SQLException {
             }
             postStatement.executeBatch();
         }
+
+        LOGGER.info("{}.testInsert for {} using allocation size {} took {} millis",
+                getClass().getSimpleName(),
+                getDataSourceProvider().getClass().getSimpleName(),
+                getAllocationSize(),
+                TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startNanos));
     }
 
     protected abstract String callSequenceSyntax();
diff --git a/core/src/test/java/com/vladmihalcea/book/high_performance_java_persistence/jdbc/batch/generatedkeys/sequence/OracleSequenceGeneratedKeysBatchPreparedStatementTest.java b/core/src/test/java/com/vladmihalcea/book/high_performance_java_persistence/jdbc/batch/generatedkeys/sequence/OracleSequenceGeneratedKeysBatchPreparedStatementTest.java
index 8601302..c7d5ba5 100644
--- a/core/src/test/java/com/vladmihalcea/book/high_performance_java_persistence/jdbc/batch/generatedkeys/sequence/OracleSequenceGeneratedKeysBatchPreparedStatementTest.java
+++ b/core/src/test/java/com/vladmihalcea/book/high_performance_java_persistence/jdbc/batch/generatedkeys/sequence/OracleSequenceGeneratedKeysBatchPreparedStatementTest.java
@@ -7,6 +7,10 @@
  */
 public class OracleSequenceGeneratedKeysBatchPreparedStatementTest extends AbstractSequenceGeneratedKeysBatchPreparedStatementTest {
 
+    public OracleSequenceGeneratedKeysBatchPreparedStatementTest(int allocationSize) {
+        super(allocationSize);
+    }
+
     @Override
     protected String callSequenceSyntax() {
         return "select post_seq.NEXTVAL from dual";
diff --git a/core/src/test/java/com/vladmihalcea/book/high_performance_java_persistence/jdbc/batch/generatedkeys/sequence/PostgreSQLSequenceGeneratedKeysBatchPreparedStatementTest.java b/core/src/test/java/com/vladmihalcea/book/high_performance_java_persistence/jdbc/batch/generatedkeys/sequence/PostgreSQLSequenceGeneratedKeysBatchPreparedStatementTest.java
index 8bd643d..676dca4 100644
--- a/core/src/test/java/com/vladmihalcea/book/high_performance_java_persistence/jdbc/batch/generatedkeys/sequence/PostgreSQLSequenceGeneratedKeysBatchPreparedStatementTest.java
+++ b/core/src/test/java/com/vladmihalcea/book/high_performance_java_persistence/jdbc/batch/generatedkeys/sequence/PostgreSQLSequenceGeneratedKeysBatchPreparedStatementTest.java
@@ -1,12 +1,16 @@
 package com.vladmihalcea.book.high_performance_java_persistence.jdbc.batch.generatedkeys.sequence;
 
 /**
- * GeneratedKeysBatchPreparedStatementTest - PostgreSQL class for testing JDBC PreparedStatement generated keys for Sequences
+ * PostgreSQLSequenceGeneratedKeysBatchPreparedStatementTest - PostgreSQL class for testing JDBC PreparedStatement generated keys for Sequences
  *
  * @author Vlad Mihalcea
  */
 public class PostgreSQLSequenceGeneratedKeysBatchPreparedStatementTest extends AbstractSequenceGeneratedKeysBatchPreparedStatementTest {
 
+    public PostgreSQLSequenceGeneratedKeysBatchPreparedStatementTest(int allocationSize) {
+        super(allocationSize);
+    }
+
     @Override
     protected String callSequenceSyntax() {
         return "select nextval('post_seq')";
diff --git a/core/src/test/java/com/vladmihalcea/book/high_performance_java_persistence/jdbc/batch/generatedkeys/sequence/SQLServerSequenceGeneratedKeysBatchPreparedStatementTest.java b/core/src/test/java/com/vladmihalcea/book/high_performance_java_persistence/jdbc/batch/generatedkeys/sequence/SQLServerSequenceGeneratedKeysBatchPreparedStatementTest.java
index 7d8beaa..2049c3e 100644
--- a/core/src/test/java/com/vladmihalcea/book/high_performance_java_persistence/jdbc/batch/generatedkeys/sequence/SQLServerSequenceGeneratedKeysBatchPreparedStatementTest.java
+++ b/core/src/test/java/com/vladmihalcea/book/high_performance_java_persistence/jdbc/batch/generatedkeys/sequence/SQLServerSequenceGeneratedKeysBatchPreparedStatementTest.java
@@ -7,6 +7,10 @@
  */
 public class SQLServerSequenceGeneratedKeysBatchPreparedStatementTest extends AbstractSequenceGeneratedKeysBatchPreparedStatementTest {
 
+    public SQLServerSequenceGeneratedKeysBatchPreparedStatementTest(int allocationSize) {
+        super(allocationSize);
+    }
+
     @Override
     protected String callSequenceSyntax() {
         return "select NEXT VALUE FOR post_seq";
diff --git a/core/src/test/resources/logback.xml b/core/src/test/resources/logback.xml
index a2b74f7..25f885a 100644
--- a/core/src/test/resources/logback.xml
+++ b/core/src/test/resources/logback.xml
@@ -22,7 +22,7 @@
 
     <logger name="org.springframework" level="warn"/>
 
-    <logger name="net.ttddyy.dsproxy.listener" level="debug"/>
+    <logger name="net.ttddyy.dsproxy.listener" level="info"/>
 
     <logger name="org.hibernate" level="warn"/>
     <logger name="org.hibernate.event.internal" level="info"/>