diff --git a/src/main/java/org/tikv/common/log/SlowLogImpl.java b/src/main/java/org/tikv/common/log/SlowLogImpl.java
index f8f92c568a..c6efcf457a 100644
--- a/src/main/java/org/tikv/common/log/SlowLogImpl.java
+++ b/src/main/java/org/tikv/common/log/SlowLogImpl.java
@@ -83,6 +83,7 @@ public class SlowLogImpl implements SlowLog {
 
   @Override
   public void log() {
+    recordTime();
     if (error != null || timeExceeded()) {
       SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss.SSS");
       logger.warn(
@@ -95,9 +96,12 @@ public class SlowLogImpl implements SlowLog {
     }
   }
 
-  boolean timeExceeded() {
+  private void recordTime() {
     long currentNS = System.nanoTime();
     durationMS = (currentNS - startNS) / 1_000_000;
+  }
+
+  boolean timeExceeded() {
     return slowThresholdMS >= 0 && durationMS > slowThresholdMS;
   }
 
diff --git a/src/test/java/org/tikv/common/log/SlowLogImplTest.java b/src/test/java/org/tikv/common/log/SlowLogImplTest.java
index 004df5cf8a..23f103575b 100644
--- a/src/test/java/org/tikv/common/log/SlowLogImplTest.java
+++ b/src/test/java/org/tikv/common/log/SlowLogImplTest.java
@@ -28,10 +28,17 @@ public class SlowLogImplTest {
   public void testThresholdTime() throws InterruptedException {
     SlowLogImpl slowLog = new SlowLogImpl(1000);
     Thread.sleep(1100);
+    slowLog.log();
     Assert.assertTrue(slowLog.timeExceeded());
 
     slowLog = new SlowLogImpl(1000);
     Thread.sleep(500);
+    slowLog.log();
+    Assert.assertFalse(slowLog.timeExceeded());
+
+    slowLog = new SlowLogImpl(-1);
+    Thread.sleep(500);
+    slowLog.log();
     Assert.assertFalse(slowLog.timeExceeded());
   }