diff --git a/core/consensus/Cargo.toml b/core/consensus/Cargo.toml
index db6836459..85e4355be 100644
--- a/core/consensus/Cargo.toml
+++ b/core/consensus/Cargo.toml
@@ -19,6 +19,7 @@ parking_lot = "0.9"
 rlp = "0.4"
 serde = {version = "1.0", features = ["derive"]}
 
+common-logger = { path = "../../common/logger"}
 common-crypto = { path = "../../common/crypto"}
 common-merkle = { path = "../../common/merkle"}
 core-mempool = { path = "../../core/mempool"}
diff --git a/core/consensus/src/engine.rs b/core/consensus/src/engine.rs
index bb045c42e..28cfdfd01 100644
--- a/core/consensus/src/engine.rs
+++ b/core/consensus/src/engine.rs
@@ -363,6 +363,12 @@ impl<Adapter: ConsensusAdapter + 'static> ConsensusEngine<Adapter> {
             .save_epoch(Context::new(), epoch.clone())
             .await?;
 
+        common_logger::metrics(common_logger::json!({
+            "name": "save_epoch",
+            "epoch_id": epoch_id,
+            "ordered_tx_num": epoch.ordered_tx_hashes.len()
+        }));
+
         let prev_hash = Hash::digest(epoch.encode_fixed()?);
         {
             let mut current_consensus_status = self.current_consensus_status.write();