diff --git a/examples/readonly-transaction-demo/src/main/java/ru/otus/demo/repository/PersonRepositoryJpa.java b/examples/readonly-transaction-demo/src/main/java/ru/otus/demo/repository/PersonRepositoryJpa.java
index fc699a67..5aee7bad 100644
--- a/examples/readonly-transaction-demo/src/main/java/ru/otus/demo/repository/PersonRepositoryJpa.java
+++ b/examples/readonly-transaction-demo/src/main/java/ru/otus/demo/repository/PersonRepositoryJpa.java
@@ -1,6 +1,7 @@
 package ru.otus.demo.repository;
 
 import lombok.RequiredArgsConstructor;
+import org.hibernate.Session;
 import org.springframework.stereotype.Repository;
 import ru.otus.demo.model.Person;
 
@@ -35,9 +36,13 @@ public class PersonRepositoryJpa implements PersonRepository {
 
     @Override
     public Person findById(long id) {
+        System.out.println("FlushMode: " + em.unwrap(Session.class).getHibernateFlushMode());
+        return em.find(Person.class, id);
+/*
         TypedQuery<Person> query = em.createQuery("select p from Person p where p.id = :id", Person.class);
         query.setParameter("id", id);
         return query.getSingleResult();
+*/
 
     }
 }
diff --git a/examples/readonly-transaction-demo/src/main/resources/application.yml b/examples/readonly-transaction-demo/src/main/resources/application.yml
index 9ddf5b1e..99cf96dd 100644
--- a/examples/readonly-transaction-demo/src/main/resources/application.yml
+++ b/examples/readonly-transaction-demo/src/main/resources/application.yml
@@ -16,4 +16,8 @@ spring:
     show-sql: true
     properties:
       hibernate:
-      #format_sql: true
\ No newline at end of file
+      #format_sql: true
+
+logging:
+  level:
+    org.hibernate.engine.transaction.internal: DEBUG
\ No newline at end of file
diff --git a/examples/readonly-transaction-demo/src/test/java/ru/otus/demo/services/PersonServiceTest.java b/examples/readonly-transaction-demo/src/test/java/ru/otus/demo/services/PersonServiceTest.java
index 1069ea0a..9576a876 100644
--- a/examples/readonly-transaction-demo/src/test/java/ru/otus/demo/services/PersonServiceTest.java
+++ b/examples/readonly-transaction-demo/src/test/java/ru/otus/demo/services/PersonServiceTest.java
@@ -27,6 +27,17 @@ class PersonServiceTest {
         personService.save(new Person(0, "Igor", new Email(0, "noname@nomail.ru")));
     }
 
+    /*
+        // Изменение имени пёрсона внутри updateWithNormalTran ПОПАДАЮТ в БД после закрытия сессии/транзакции
+        // Работаем в обычной транзакции (в логах есть ее начало и коммит, а так же update)
+        // FlushMode: AUTO (есть в логах)
+
+        2021-07-24 19:21:16.310 DEBUG 8636 --- [           main] o.h.e.t.internal.TransactionImpl         : begin
+        Hibernate: select person0_.id as id1_1_, person0_.email_id as email_id3_1_, person0_.name as name2_1_ from person person0_ where person0_.id=?
+        Hibernate: select email0_.id as id1_0_0_, email0_.address as address2_0_0_ from email email0_ where email0_.id=?
+        2021-07-24 19:21:16.390 DEBUG 8636 --- [           main] o.h.e.t.internal.TransactionImpl         : committing
+        Hibernate: update person set email_id=?, name=? where id=?
+     */
     @Test
     void updateWithNormalTran() {
         personService.updateWithNormalTran(1, "Vasya");
@@ -34,6 +45,17 @@ class PersonServiceTest {
         assertThat(actualPerson).extracting(Person::getName).isEqualTo("Vasya");
     }
 
+    /*
+        // Работаем в readonly транзакции (в логах есть ее начало и коммит)
+        // Изменение имени пёрсона внутри updateWithReadonlyTran НЕ попадают в БД после закрытия сессии/транзакции
+        // FlushMode: MANUAL (есть в логах), поэтому изменения и не попадают
+
+        2021-07-24 19:15:22.889 DEBUG 11024 --- [           main] o.h.e.t.internal.TransactionImpl         : begin
+        Hibernate: select person0_.id as id1_1_, person0_.email_id as email_id3_1_, person0_.name as name2_1_ from person person0_ where person0_.id=?
+        Hibernate: select email0_.id as id1_0_0_, email0_.address as address2_0_0_ from email email0_ where email0_.id=?
+        2021-07-24 19:15:22.967 DEBUG 11024 --- [           main] o.h.e.t.internal.TransactionImpl         : committing
+
+     */
     @Test
     void updateWithReadonlyTran() {
         personService.updateWithReadonlyTran(1, "Vasya");
@@ -41,6 +63,14 @@ class PersonServiceTest {
         assertThat(actualPerson).extracting(Person::getName).isEqualTo("Igor");
     }
 
+    /*
+        // Работаем без транзакции (в логах нет ее начала и коммита)
+        // Изменение имени пёрсона внутри updateWithoutTran НЕ попадают в БД после закрытия сессии/транзакции
+        // FlushMode: AUTO (есть в логах)
+
+        Hibernate: select person0_.id as id1_1_, person0_.email_id as email_id3_1_, person0_.name as name2_1_ from person person0_ where person0_.id=?
+        Hibernate: select email0_.id as id1_0_0_, email0_.address as address2_0_0_ from email email0_ where email0_.id=?
+     */
     @Test
     void updateWithoutTran() {
         personService.updateWithoutTran(1, "Vasya");
diff --git a/examples/readonly-transaction-demo/src/test/java/ru/otus/demo/services/TransactionsTest.java b/examples/readonly-transaction-demo/src/test/java/ru/otus/demo/services/TransactionsTest.java
new file mode 100644
index 00000000..505ff189
--- /dev/null
+++ b/examples/readonly-transaction-demo/src/test/java/ru/otus/demo/services/TransactionsTest.java
@@ -0,0 +1,83 @@
+package ru.otus.demo.services;
+
+import org.hibernate.FlushMode;
+import org.hibernate.Session;
+import org.hibernate.SessionFactory;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.jdbc.AutoConfigureTestDatabase;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.transaction.TransactionManager;
+import org.springframework.transaction.annotation.Propagation;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.transaction.support.TransactionTemplate;
+import ru.otus.demo.model.Email;
+import ru.otus.demo.model.Person;
+
+import javax.persistence.EntityManager;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+
+@SpringBootTest
+@AutoConfigureTestDatabase(replace = AutoConfigureTestDatabase.Replace.NONE)
+@Transactional(propagation = Propagation.NOT_SUPPORTED)
+@DirtiesContext(classMode = DirtiesContext.ClassMode.BEFORE_EACH_TEST_METHOD)
+class TransactionsTest {
+
+    private static final Person expectedPerson = new Person(1L, "Igor",
+            new Email(1L, "noname@nomail.ru"));
+
+    @Autowired
+    private SessionFactory sf;
+
+    @Autowired
+    private Session s;
+
+    @Autowired
+    private TransactionTemplate tm;
+
+    @BeforeEach
+    void setUp() {
+        tm.setReadOnly(false);
+        tm.execute(status -> {
+            s.persist(new Person(0, expectedPerson.getName(),
+                    new Email(0, expectedPerson.getEmail().getAddress())));
+            return null;
+        });
+
+        sf.getStatistics().setStatisticsEnabled(true);
+        sf.getStatistics().clear();
+    }
+
+    @Test
+    void findWithNormalTran() {
+        tm.setReadOnly(false);
+        Person actualPerson = tm.execute(status -> {
+            assertThat(s.getHibernateFlushMode()).isEqualTo(FlushMode.AUTO);
+            return s.find(Person.class, 1L);
+        });
+        assertThat(actualPerson).usingRecursiveComparison().isEqualTo(expectedPerson);
+        assertThat(sf.getStatistics().getTransactionCount()).isEqualTo(1);
+    }
+
+    @Test
+    void findWithReadOnlyTran() {
+        tm.setReadOnly(true);
+        Person actualPerson = tm.execute(status -> {
+            assertThat(s.getHibernateFlushMode()).isEqualTo(FlushMode.MANUAL);
+            return s.find(Person.class, 1L);
+        });
+        assertThat(actualPerson).usingRecursiveComparison().isEqualTo(expectedPerson);
+        assertThat(sf.getStatistics().getTransactionCount()).isEqualTo(1);
+    }
+
+    @Test
+    void findWithoutTran() {
+        assertThat(s.getHibernateFlushMode()).isEqualTo(FlushMode.AUTO);
+        Person actualPerson = s.find(Person.class, 1L);
+        assertThat(actualPerson).usingRecursiveComparison().isEqualTo(expectedPerson);
+        assertThat(sf.getStatistics().getTransactionCount()).isEqualTo(0);
+    }
+}
\ No newline at end of file
diff --git a/examples/spring-mail-integration-demo/src/main/java/ru/otus/example/springmail_integration_demo/integration/IntegrationConfig.java b/examples/spring-mail-integration-demo/src/main/java/ru/otus/example/springmail_integration_demo/integration/IntegrationConfig.java
index abdf6183..f039a8c8 100644
--- a/examples/spring-mail-integration-demo/src/main/java/ru/otus/example/springmail_integration_demo/integration/IntegrationConfig.java
+++ b/examples/spring-mail-integration-demo/src/main/java/ru/otus/example/springmail_integration_demo/integration/IntegrationConfig.java
@@ -1,6 +1,5 @@
 package ru.otus.example.springmail_integration_demo.integration;
 
-import lombok.val;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -10,7 +9,6 @@ import org.springframework.integration.dsl.IntegrationFlowDefinition;
 import org.springframework.integration.dsl.MessageChannels;
 import org.springframework.integration.dsl.Pollers;
 import org.springframework.integration.scheduling.PollerMetadata;
-import org.springframework.mail.SimpleMailMessage;
 import org.springframework.mail.javamail.JavaMailSender;
 import org.springframework.messaging.Message;
 import org.springframework.messaging.PollableChannel;
diff --git a/examples/spring-mail-integration-demo/src/main/java/ru/otus/example/springmail_integration_demo/services/ActivityStatCalculationEmitterSerivce.java b/examples/spring-mail-integration-demo/src/main/java/ru/otus/example/springmail_integration_demo/services/ActivityStatCalculationEmitterSerivce.java
index a14d2ca8..ceaac606 100644
--- a/examples/spring-mail-integration-demo/src/main/java/ru/otus/example/springmail_integration_demo/services/ActivityStatCalculationEmitterSerivce.java
+++ b/examples/spring-mail-integration-demo/src/main/java/ru/otus/example/springmail_integration_demo/services/ActivityStatCalculationEmitterSerivce.java
@@ -4,16 +4,12 @@ import lombok.RequiredArgsConstructor;
 import org.springframework.scheduling.annotation.Scheduled;
 import org.springframework.stereotype.Service;
 import ru.otus.example.springmail_integration_demo.integration.ActivityStatGateway;
-import ru.otus.example.springmail_integration_demo.repositories.ActivityTypeRepository;
-import ru.otus.example.springmail_integration_demo.repositories.AppUserRepository;
 
 @RequiredArgsConstructor
 @Service
 public class ActivityStatCalculationEmitterSerivce {
     private static final String EMPTY_EXT_INFO = "none";
 
-    private final ActivityTypeRepository activityTypeRepository;
-    private final AppUserRepository appUserRepository;
     private final ActivityStatGateway activityStatGateway;
 
     @Scheduled(initialDelay = 3000, fixedRate = 10000)
diff --git a/examples/spring-mail-rabbitmq-demo/user-activity-processor-microservice/src/main/java/ru/otus/example/rabbitmq/rabbitmq/RabbitMqListener.java b/examples/spring-mail-rabbitmq-demo/user-activity-processor-microservice/src/main/java/ru/otus/example/rabbitmq/rabbitmq/RabbitMqListener.java
index 4e390d31..6868dd9f 100644
--- a/examples/spring-mail-rabbitmq-demo/user-activity-processor-microservice/src/main/java/ru/otus/example/rabbitmq/rabbitmq/RabbitMqListener.java
+++ b/examples/spring-mail-rabbitmq-demo/user-activity-processor-microservice/src/main/java/ru/otus/example/rabbitmq/rabbitmq/RabbitMqListener.java
@@ -28,7 +28,7 @@ public class RabbitMqListener {
 
         val userActivity = objectMapper.readValue(message, UserActivity.class);
         val mailMessage = messageTransformer.transform(userActivity);
-        //System.out.println("Как будто посылаем письмо: " + mailMessage);
+        System.out.println("Как будто посылаем письмо: " + mailMessage);
         //mailSender.send(mailMessage);
     }
 
@@ -46,7 +46,7 @@ public class RabbitMqListener {
 
     @RabbitListener(queues = "stat-calc-commands-queue")
     public void processStatCalcCommandsMessages(String message) {
-        //System.out.println("RECEIVED FROM stat-calc-commands-queue: " + message);
+        System.out.println("RECEIVED FROM stat-calc-commands-queue: " + message);
 
         activityStatRepository.deleteAll();
         val activityStat = activityStatRepository.calcActivityStat();