page_cleaner: 1000ms intended loop took 4724ms. The settings might not be optimal. (flushed=1037, during the time.)
2018-07-09T14:28:56.853600Z 0 [Note] InnoDB: page_cleaner: 1000ms intended loop took 4724ms. The settings might not be optimal. (flushed=1037, during the time.)