diff --git a/lib/trace/trace.class.php b/lib/trace/trace.class.php
index 78d26b1671..c351d3895b 100644
--- a/lib/trace/trace.class.php
+++ b/lib/trace/trace.class.php
@@ -85,11 +85,10 @@ class trace
         /* 达梦数据库不支持下面的语法，直接跳过。The  */
         if($config->db->driver === 'dm') return;
 
-        ini_set('serialize_precision', 14);
-        ini_set('precision', 14);
-
         $profiling = $this->dao->dbh->query('SHOW PROFILES')->fetchAll(PDO::FETCH_ASSOC);
 
+        foreach($profiling as $key => $profile) $profiling[$key]['Duration'] = number_format($profile['Duration'], 4);
+
         $this->trace['profiles'] = $profiling;
     }