diff --git a/plugins/inputs/mysql/mysql.go b/plugins/inputs/mysql/mysql.go
index 514aa4d7acd4d..c0c9676a32cd2 100644
--- a/plugins/inputs/mysql/mysql.go
+++ b/plugins/inputs/mysql/mysql.go
@@ -205,6 +205,8 @@ func (m *Mysql) Gather(acc telegraf.Accumulator) error {
 	}
 
 	wg.Wait()
+	m.lastT = time.Now() // maybe multiple instance
+
 	return nil
 }
 
@@ -502,7 +504,6 @@ func (m *Mysql) gatherServer(serv string, acc telegraf.Accumulator) error {
 				if err != nil {
 					return err
 				}
-				m.lastT = time.Now()
 			}
 		}
 	}
diff --git a/scripts/telegraf-discover b/scripts/telegraf-discover
index e81eb75c7e508..99645687e9b2b 100755
--- a/scripts/telegraf-discover
+++ b/scripts/telegraf-discover
@@ -2099,7 +2099,7 @@ sub disc_mysql {
 
   ## Some queries we may want to run less often (such as SHOW GLOBAL VARIABLES)
   ##   example: interval_slow = "30m"
-  interval_slow = "1m"
+  interval_slow = "3m"
 TEMP_END
 
   return _replace_mysql($temp, $items);