diff --git a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/amqp/RabbitProperties.java b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/amqp/RabbitProperties.java
index e06a6c875d..6443dface3 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/amqp/RabbitProperties.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/amqp/RabbitProperties.java
@@ -24,6 +24,7 @@ import java.util.List;
 import org.springframework.amqp.core.AcknowledgeMode;
 import org.springframework.amqp.rabbit.connection.CachingConnectionFactory.CacheMode;
 import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.context.properties.DeprecatedConfigurationProperty;
 import org.springframework.boot.convert.DurationUnit;
 import org.springframework.util.CollectionUtils;
 import org.springframework.util.StringUtils;
@@ -662,10 +663,10 @@ public class RabbitProperties {
 		private Integer maxConcurrency;
 
 		/**
-		 * Number of messages to be processed between acks when the acknowledge mode is
-		 * AUTO. If larger than prefetch, prefetch will be increased to this value.
+		 * Batch size, expressed as the number of physical messages, to be used by the
+		 * container.
 		 */
-		private Integer transactionSize;
+		private Integer batchSize;
 
 		/**
 		 * Whether to fail if the queues declared by the container are not available on
@@ -690,12 +691,34 @@ public class RabbitProperties {
 			this.maxConcurrency = maxConcurrency;
 		}
 
+		/**
+		 * Return the number of messages processed in one transaction.
+		 * @return the number of messages
+		 * @deprecated since 2.2.0 in favor of {@link SimpleContainer#getBatchSize()}
+		 */
+		@DeprecatedConfigurationProperty(replacement = "spring.rabbitmq.listener.simple.batch-size")
+		@Deprecated
 		public Integer getTransactionSize() {
-			return this.transactionSize;
+			return getBatchSize();
 		}
 
+		/**
+		 * Set the number of messages processed in one transaction.
+		 * @param transactionSize the number of messages
+		 * @deprecated since 2.2.0 in favor of
+		 * {@link SimpleContainer#setBatchSize(Integer)}
+		 */
+		@Deprecated
 		public void setTransactionSize(Integer transactionSize) {
-			this.transactionSize = transactionSize;
+			setBatchSize(transactionSize);
+		}
+
+		public Integer getBatchSize() {
+			return this.batchSize;
+		}
+
+		public void setBatchSize(Integer batchSize) {
+			this.batchSize = batchSize;
 		}
 
 		@Override
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/amqp/SimpleRabbitListenerContainerFactoryConfigurer.java b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/amqp/SimpleRabbitListenerContainerFactoryConfigurer.java
index a45c1bb620..cb9c86cc71 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/amqp/SimpleRabbitListenerContainerFactoryConfigurer.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/amqp/SimpleRabbitListenerContainerFactoryConfigurer.java
@@ -38,7 +38,7 @@ public final class SimpleRabbitListenerContainerFactoryConfigurer
 		configure(factory, connectionFactory, config);
 		map.from(config::getConcurrency).whenNonNull().to(factory::setConcurrentConsumers);
 		map.from(config::getMaxConcurrency).whenNonNull().to(factory::setMaxConcurrentConsumers);
-		map.from(config::getTransactionSize).whenNonNull().to(factory::setTxSize);
+		map.from(config::getBatchSize).whenNonNull().to(factory::setBatchSize);
 	}
 
 }
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/amqp/RabbitAutoConfigurationTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/amqp/RabbitAutoConfigurationTests.java
index 396a191905..8a5ba0036e 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/amqp/RabbitAutoConfigurationTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/amqp/RabbitAutoConfigurationTests.java
@@ -17,6 +17,7 @@
 package org.springframework.boot.autoconfigure.amqp;
 
 import java.security.NoSuchAlgorithmException;
+import java.util.List;
 import java.util.concurrent.atomic.AtomicInteger;
 
 import javax.net.ssl.SSLContext;
@@ -125,6 +126,7 @@ class RabbitAutoConfigurationTests {
 	}
 
 	@Test
+	@SuppressWarnings("unchecked")
 	void testConnectionFactoryWithOverrides() {
 		this.contextRunner.withUserConfiguration(TestConfiguration.class)
 				.withPropertyValues("spring.rabbitmq.host:remote-server", "spring.rabbitmq.port:9000",
@@ -137,15 +139,16 @@ class RabbitAutoConfigurationTests {
 					assertThat(connectionFactory.getVirtualHost()).isEqualTo("/vhost");
 					com.rabbitmq.client.ConnectionFactory rcf = connectionFactory.getRabbitConnectionFactory();
 					assertThat(rcf.getConnectionTimeout()).isEqualTo(123);
-					assertThat((Address[]) ReflectionTestUtils.getField(connectionFactory, "addresses")).hasSize(1);
+					assertThat((List<Address>) ReflectionTestUtils.getField(connectionFactory, "addresses")).hasSize(1);
 				});
 	}
 
 	@Test
+	@SuppressWarnings("unchecked")
 	void testConnectionFactoryWithCustomConnectionNameStrategy() {
 		this.contextRunner.withUserConfiguration(ConnectionNameStrategyConfiguration.class).run((context) -> {
 			CachingConnectionFactory connectionFactory = context.getBean(CachingConnectionFactory.class);
-			Address[] addresses = (Address[]) ReflectionTestUtils.getField(connectionFactory, "addresses");
+			List<Address> addresses = (List<Address>) ReflectionTestUtils.getField(connectionFactory, "addresses");
 			assertThat(addresses).hasSize(1);
 			com.rabbitmq.client.ConnectionFactory rcf = mock(com.rabbitmq.client.ConnectionFactory.class);
 			given(rcf.newConnection(isNull(), eq(addresses), anyString())).willReturn(mock(Connection.class));
@@ -363,8 +366,8 @@ class RabbitAutoConfigurationTests {
 		this.contextRunner.withUserConfiguration(TestConfiguration5.class).run((context) -> {
 			SimpleRabbitListenerContainerFactory rabbitListenerContainerFactory = context
 					.getBean("rabbitListenerContainerFactory", SimpleRabbitListenerContainerFactory.class);
-			rabbitListenerContainerFactory.setTxSize(10);
-			verify(rabbitListenerContainerFactory).setTxSize(10);
+			rabbitListenerContainerFactory.setBatchSize(10);
+			verify(rabbitListenerContainerFactory).setBatchSize(10);
 			assertThat(rabbitListenerContainerFactory.getAdviceChain()).isNull();
 		});
 	}
@@ -385,7 +388,7 @@ class RabbitAutoConfigurationTests {
 						"spring.rabbitmq.listener.simple.prefetch:40",
 						"spring.rabbitmq.listener.simple.defaultRequeueRejected:false",
 						"spring.rabbitmq.listener.simple.idleEventInterval:5",
-						"spring.rabbitmq.listener.simple.transactionSize:20",
+						"spring.rabbitmq.listener.simple.batchSize:20",
 						"spring.rabbitmq.listener.simple.missingQueuesFatal:false")
 				.run((context) -> {
 					SimpleRabbitListenerContainerFactory rabbitListenerContainerFactory = context
@@ -393,12 +396,24 @@ class RabbitAutoConfigurationTests {
 					assertThat(rabbitListenerContainerFactory).hasFieldOrPropertyWithValue("concurrentConsumers", 5);
 					assertThat(rabbitListenerContainerFactory).hasFieldOrPropertyWithValue("maxConcurrentConsumers",
 							10);
-					assertThat(rabbitListenerContainerFactory).hasFieldOrPropertyWithValue("txSize", 20);
+					assertThat(rabbitListenerContainerFactory).hasFieldOrPropertyWithValue("batchSize", 20);
 					assertThat(rabbitListenerContainerFactory).hasFieldOrPropertyWithValue("missingQueuesFatal", false);
 					checkCommonProps(context, rabbitListenerContainerFactory);
 				});
 	}
 
+	@Test
+	@Deprecated
+	void testRabbitListenerContainerFactoryWithDeprecatedTransactionSizeStillWorks() {
+		this.contextRunner
+				.withUserConfiguration(MessageConvertersConfiguration.class, MessageRecoverersConfiguration.class)
+				.withPropertyValues("spring.rabbitmq.listener.simple.transactionSize:20").run((context) -> {
+					SimpleRabbitListenerContainerFactory rabbitListenerContainerFactory = context
+							.getBean("rabbitListenerContainerFactory", SimpleRabbitListenerContainerFactory.class);
+					assertThat(rabbitListenerContainerFactory).hasFieldOrPropertyWithValue("batchSize", 20);
+				});
+	}
+
 	@Test
 	void testDirectRabbitListenerContainerFactoryWithCustomSettings() {
 		this.contextRunner