diff --git a/output/outputs.go b/output/outputs.go
index 21dd2d5..492fd0e 100644
--- a/output/outputs.go
+++ b/output/outputs.go
@@ -177,7 +177,7 @@ func RunHandler(w http.ResponseWriter, r *http.Request) {
 					// remove the exited process from user process set
 					processes.remove(wSession, cmd.Process)
 
-					logger.Debugf("Session [%s] 's running [id=%d, file=%s] has done [stdout err]", sid, runningId, filePath)
+					logger.Tracef("Session [%s] 's running [id=%d, file=%s] has done [stdout err]", sid, runningId, filePath)
 
 					if nil != wsChannel {
 						channelRet["cmd"] = "run-done"
@@ -223,7 +223,7 @@ func RunHandler(w http.ResponseWriter, r *http.Request) {
 				// remove the exited process from user process set
 				processes.remove(wSession, cmd.Process)
 
-				logger.Debugf("Session [%s] 's running [id=%d, file=%s] has done [stderr err]", sid, runningId, filePath)
+				logger.Tracef("Session [%s] 's running [id=%d, file=%s] has done [stderr err]", sid, runningId, filePath)
 
 				channelRet["cmd"] = "run-done"
 				channelRet["output"] = "<span class='stderr'>" + buf + "</span>"
diff --git a/output/processes.go b/output/processes.go
index 88ec622..2b0fa6f 100644
--- a/output/processes.go
+++ b/output/processes.go
@@ -46,7 +46,7 @@ func (procs *procs) add(wSession *session.WideSession, proc *os.Process) {
 	// bind process with wide session
 	wSession.SetProcesses(userProcesses)
 
-	logger.Debugf("Session [%s] has [%d] processes", sid, len((*procs)[sid]))
+	logger.Tracef("Session [%s] has [%d] processes", sid, len((*procs)[sid]))
 }
 
 // remove removes the specified process from the user process set.
@@ -67,7 +67,7 @@ func (procs *procs) remove(wSession *session.WideSession, proc *os.Process) {
 			// bind process with wide session
 			wSession.SetProcesses(newProcesses)
 
-			logger.Debugf("Session [%s] has [%d] processes", sid, len((*procs)[sid]))
+			logger.Tracef("Session [%s] has [%d] processes", sid, len((*procs)[sid]))
 
 			return
 		}