diff --git a/td/telegram/ContactsManager.cpp b/td/telegram/ContactsManager.cpp
index b51f43eda..b3bcb27fd 100644
--- a/td/telegram/ContactsManager.cpp
+++ b/td/telegram/ContactsManager.cpp
@@ -3317,6 +3317,11 @@ ContactsManager::~ContactsManager() = default;
 
 void ContactsManager::tear_down() {
   parent_.reset();
+
+  LOG(DEBUG) << "Have " << users_.size() << " users, " << chats_.size() << " basic groups, " << channels_.size()
+             << " supergroups and " << secret_chats_.size() << " secret chats to free";
+  LOG(DEBUG) << "Have " << users_full_.size() << " full users, " << chats_full_.size() << " full basic groups and "
+             << channels_full_.size() << " full supergroups to free";
 }
 
 UserId ContactsManager::load_my_id() {
diff --git a/td/telegram/MessagesManager.cpp b/td/telegram/MessagesManager.cpp
index 3dcbb70f6..325aa560c 100644
--- a/td/telegram/MessagesManager.cpp
+++ b/td/telegram/MessagesManager.cpp
@@ -13027,6 +13027,8 @@ class MessagesManager::DialogFiltersLogEvent {
 
 void MessagesManager::tear_down() {
   parent_.reset();
+
+  LOG(DEBUG) << "Have " << dialogs_.size() << " chats with " << added_message_count_ << " messages to free";
 }
 
 void MessagesManager::hangup() {
@@ -16158,6 +16160,8 @@ void MessagesManager::on_message_deleted(Dialog *d, Message *m, bool is_permanen
   if (m->notification_id.is_valid()) {
     delete_notification_id_to_message_id_correspondence(d, m->notification_id, m->message_id);
   }
+
+  added_message_count_--;
 }
 
 unique_ptr<MessagesManager::Message> MessagesManager::do_delete_scheduled_message(Dialog *d, MessageId message_id,
@@ -34585,6 +34589,8 @@ MessagesManager::Message *MessagesManager::add_message_to_dialog(Dialog *d, uniq
     }
   }
 
+  added_message_count_++;
+
   return result_message;
 }
 
diff --git a/td/telegram/MessagesManager.h b/td/telegram/MessagesManager.h
index cf7b64699..41fbe33e7 100644
--- a/td/telegram/MessagesManager.h
+++ b/td/telegram/MessagesManager.h
@@ -3417,6 +3417,7 @@ class MessagesManager final : public Actor {
   bool running_get_difference_ = false;  // true after before_get_difference and false after after_get_difference
 
   FlatHashMap<DialogId, unique_ptr<Dialog>, DialogIdHash> dialogs_;
+  int64 added_message_count_ = 0;
 
   FlatHashSet<DialogId, DialogIdHash> loaded_dialogs_;  // dialogs loaded from database, but not added to dialogs_
 
diff --git a/td/telegram/UpdatesManager.cpp b/td/telegram/UpdatesManager.cpp
index fea5d34db..8af9fdada 100644
--- a/td/telegram/UpdatesManager.cpp
+++ b/td/telegram/UpdatesManager.cpp
@@ -177,6 +177,8 @@ UpdatesManager::UpdatesManager(Td *td, ActorShared<> parent) : td_(td), parent_(
 
 void UpdatesManager::tear_down() {
   parent_.reset();
+
+  LOG(DEBUG) << "Have " << being_processed_updates_ << " unprocessed updates to apply";
 }
 
 void UpdatesManager::hangup_shared() {
@@ -1709,6 +1711,7 @@ void UpdatesManager::on_pending_updates(vector<tl_object_ptr<telegram_api::Updat
   }
 
   MultiPromiseActorSafe mpas{"OnPendingUpdatesMultiPromiseActor"};
+  being_processed_updates_++;
   mpas.add_promise([actor_id = create_reference(), promise = std::move(promise)](Result<Unit> &&result) mutable {
     send_closure(actor_id, &UpdatesManager::on_pending_updates_processed, std::move(result), std::move(promise));
   });
@@ -1831,6 +1834,7 @@ void UpdatesManager::on_pending_updates(vector<tl_object_ptr<telegram_api::Updat
 }
 
 void UpdatesManager::on_pending_updates_processed(Result<Unit> result, Promise<Unit> promise) {
+  being_processed_updates_--;
   promise.set_result(std::move(result));
 }
 
diff --git a/td/telegram/UpdatesManager.h b/td/telegram/UpdatesManager.h
index 8afa58000..172e73fe6 100644
--- a/td/telegram/UpdatesManager.h
+++ b/td/telegram/UpdatesManager.h
@@ -195,6 +195,8 @@ class UpdatesManager final : public Actor {
   int32 pending_pts_ = 0;
   int32 pending_qts_ = 0;
 
+  int64 being_processed_updates_ = 0;
+
   int32 short_update_date_ = 0;
 
   int32 accumulated_pts_count_ = 0;
diff --git a/td/telegram/WebPagesManager.cpp b/td/telegram/WebPagesManager.cpp
index cf5b3ebcb..08438292a 100644
--- a/td/telegram/WebPagesManager.cpp
+++ b/td/telegram/WebPagesManager.cpp
@@ -413,6 +413,8 @@ WebPagesManager::WebPagesManager(Td *td, ActorShared<> parent) : td_(td), parent
 
 void WebPagesManager::tear_down() {
   parent_.reset();
+
+  LOG(DEBUG) << "Have " << web_pages_.size() << " web pages to free";
 }
 
 WebPagesManager::~WebPagesManager() = default;
diff --git a/td/telegram/files/FileManager.cpp b/td/telegram/files/FileManager.cpp
index f5cf6e510..da6c236ad 100644
--- a/td/telegram/files/FileManager.cpp
+++ b/td/telegram/files/FileManager.cpp
@@ -3918,6 +3918,10 @@ void FileManager::hangup() {
 
 void FileManager::tear_down() {
   parent_.reset();
+
+  LOG(DEBUG) << "Have " << file_id_info_.size() << " files with " << file_nodes_.size() << " file nodes, "
+             << local_location_to_file_id_.size() << " local locations and " << remote_location_info_.size()
+             << " remote locations to free";
 }
 
 constexpr int64 FileManager::KEEP_DOWNLOAD_LIMIT;
diff --git a/tdutils/td/utils/Enumerator.h b/tdutils/td/utils/Enumerator.h
index 998cd8436..e89fd6718 100644
--- a/tdutils/td/utils/Enumerator.h
+++ b/tdutils/td/utils/Enumerator.h
@@ -37,6 +37,11 @@ class Enumerator {
     return *arr_[pos];
   }
 
+  size_t size() const {
+    CHECK(map_.size() == arr_.size());
+    return arr_.size();
+  }
+
  private:
   std::map<ValueT, int32> map_;
   std::vector<const ValueT *> arr_;