admin update

admin/templates/default/analysis.provider.php

@@ -462,7 +462,7 @@
             let end_time = parseInt((new Date(query_end_time)).getTime() / 1000);
 
             if (!start_time && !end_time) {
-                start_time = Date.parse(new Date()) / 1000 - 7200;
+                start_time = Date.parse(new Date()) / 1000 - 1800;
                 end_time = Date.parse(new Date()) / 1000;
             }