diff --git a/src/app/metrics.rs b/src/app/metrics.rs
index e1bce35..4445e46 100644
--- a/src/app/metrics.rs
+++ b/src/app/metrics.rs
@@ -1,6 +1,12 @@
 use prometheus::{Encoder, IntGauge, IntGaugeVec, Opts, Registry, TextEncoder};
 
-use crate::{data_readers::DataReaderConnection, db::DbTableMetrics};
+use crate::db::DbTableMetrics;
+
+#[async_trait::async_trait]
+pub trait UpdatePendingToSyncModel {
+    async fn get_name(&self) -> Option<String>;
+    fn get_pending_to_sync(&self) -> usize;
+}
 
 pub struct PrometheusMetrics {
     registry: Registry,
@@ -93,7 +99,10 @@ impl PrometheusMetrics {
             .set(persist_delay);
     }
 
-    pub async fn update_pending_to_sync(&self, data_reader_connection: &DataReaderConnection) {
+    pub async fn update_pending_to_sync<TUpdatePendingToSyncModel: UpdatePendingToSyncModel>(
+        &self,
+        data_reader_connection: &TUpdatePendingToSyncModel,
+    ) {
         let name = data_reader_connection.get_name().await;
 
         if name.is_none() {
@@ -102,14 +111,17 @@ impl PrometheusMetrics {
 
         let name = name.unwrap();
 
-        let pending_to_sync = data_reader_connection.get_pending_to_send();
+        let pending_to_sync = data_reader_connection.get_pending_to_sync();
 
         self.pending_to_sync
             .with_label_values(&[&name])
             .set(pending_to_sync as i64);
     }
 
-    pub async fn remove_pending_to_sync(&self, data_reader_connection: &DataReaderConnection) {
+    pub async fn remove_pending_to_sync<TUpdatePendingToSyncModel: UpdatePendingToSyncModel>(
+        &self,
+        data_reader_connection: &TUpdatePendingToSyncModel,
+    ) {
         let name = data_reader_connection.get_name().await;
         if name.is_none() {
             return;
diff --git a/src/app/mod.rs b/src/app/mod.rs
index f044d57..886eec9 100644
--- a/src/app/mod.rs
+++ b/src/app/mod.rs
@@ -7,5 +7,6 @@ mod request_metrics;
 
 pub use app_ctx::{AppContext, APP_VERSION, DEFAULT_PERSIST_PERIOD};
 pub use metrics::PrometheusMetrics;
+pub use metrics::UpdatePendingToSyncModel;
 pub use persist_history_duration::PersistHistoryDuration;
 pub use request_metrics::{RequestMetric, RequestMetrics};
diff --git a/src/background/tcp_connection_send_event_loop.rs b/src/background/tcp_connection_send_event_loop.rs
index 643a085..c30495e 100644
--- a/src/background/tcp_connection_send_event_loop.rs
+++ b/src/background/tcp_connection_send_event_loop.rs
@@ -2,16 +2,18 @@ use std::sync::Arc;
 
 use rust_extensions::events_loop::EventsLoopTick;
 
-use crate::data_readers::tcp_connection::TcpConnectionInfo;
+use crate::{app::AppContext, data_readers::tcp_connection::TcpConnectionInfo};
 
 pub struct TcpConnectionSendEventLoop {
+    app: Arc<AppContext>,
     tcp_connection_info: Arc<TcpConnectionInfo>,
 }
 
 impl TcpConnectionSendEventLoop {
-    pub fn new(tcp_connection_info: Arc<TcpConnectionInfo>) -> Self {
+    pub fn new(app: Arc<AppContext>, tcp_connection_info: Arc<TcpConnectionInfo>) -> Self {
         Self {
             tcp_connection_info,
+            app,
         }
     }
 }
@@ -20,5 +22,9 @@ impl TcpConnectionSendEventLoop {
 impl EventsLoopTick<()> for TcpConnectionSendEventLoop {
     async fn tick(&self, _model: ()) {
         self.tcp_connection_info.flush_payloads().await;
+        self.app
+            .metrics
+            .update_pending_to_sync(self.tcp_connection_info.as_ref())
+            .await;
     }
 }
diff --git a/src/data_readers/connection.rs b/src/data_readers/connection.rs
index 335d75f..7f2c91b 100644
--- a/src/data_readers/connection.rs
+++ b/src/data_readers/connection.rs
@@ -8,13 +8,6 @@ pub enum DataReaderConnection {
 }
 
 impl DataReaderConnection {
-    pub fn get_pending_to_send(&self) -> usize {
-        match self {
-            DataReaderConnection::Tcp(tcp_info) => tcp_info.get_pending_to_send(),
-            DataReaderConnection::Http(http_info) => http_info.get_pending_to_send(),
-        }
-    }
-
     pub async fn get_name(&self) -> Option<String> {
         match self {
             DataReaderConnection::Tcp(tcp_info) => tcp_info.get_name().await,
@@ -29,3 +22,17 @@ impl DataReaderConnection {
         }
     }
 }
+
+#[async_trait::async_trait]
+impl crate::app::UpdatePendingToSyncModel for DataReaderConnection {
+    async fn get_name(&self) -> Option<String> {
+        self.get_name().await
+    }
+
+    fn get_pending_to_sync(&self) -> usize {
+        match self {
+            DataReaderConnection::Tcp(tcp_info) => tcp_info.get_pending_to_send(),
+            DataReaderConnection::Http(http_info) => http_info.get_pending_to_send(),
+        }
+    }
+}
diff --git a/src/data_readers/data_readers_list.rs b/src/data_readers/data_readers_list.rs
index 89e88c9..476dc27 100644
--- a/src/data_readers/data_readers_list.rs
+++ b/src/data_readers/data_readers_list.rs
@@ -46,6 +46,7 @@ impl DataReadersList {
         connection_info
             .flush_events_loop
             .register_event_loop(Arc::new(TcpConnectionSendEventLoop::new(
+                app.clone(),
                 connection_info.clone(),
             )))
             .await;
diff --git a/src/data_readers/tcp_connection/tcp_connection_info.rs b/src/data_readers/tcp_connection/tcp_connection_info.rs
index 1a26ecc..0ea0798 100644
--- a/src/data_readers/tcp_connection/tcp_connection_info.rs
+++ b/src/data_readers/tcp_connection/tcp_connection_info.rs
@@ -106,3 +106,14 @@ impl TcpConnectionInfo {
             .load(std::sync::atomic::Ordering::Relaxed)
     }
 }
+
+#[async_trait::async_trait]
+impl crate::app::UpdatePendingToSyncModel for TcpConnectionInfo {
+    async fn get_name(&self) -> Option<String> {
+        self.get_name().await
+    }
+
+    fn get_pending_to_sync(&self) -> usize {
+        self.get_pending_to_send()
+    }
+}