diff --git a/store/tikv/2pc.go b/store/tikv/2pc.go
index 347490b64ebf1..ad0356bb32c31 100644
--- a/store/tikv/2pc.go
+++ b/store/tikv/2pc.go
@@ -531,10 +531,12 @@ func (c *twoPhaseCommitter) cleanupSingleBatch(bo *Backoffer, batch batchKeys) e
 }
 
 func (c *twoPhaseCommitter) prewriteKeys(bo *Backoffer, keys [][]byte) error {
+	log.Info("conn:%d 2pc prewrite, start ts = %d", c.connID, c.startTS)
 	return c.doActionOnKeys(bo, actionPrewrite, keys)
 }
 
 func (c *twoPhaseCommitter) commitKeys(bo *Backoffer, keys [][]byte) error {
+	log.Info("conn:%d 2pc commit, commit ts = %d", c.connID, c.commitTS)
 	return c.doActionOnKeys(bo, actionCommit, keys)
 }