Recently we migrated a database system from MySQL 5.7 to MariaDB 10.3. Everything went fine so far just the following message started to pop-up in the MariaDB Error Log File with the severity Note:
InnoDB: page_cleaner: 1000ms intended loop took 4674ms. The settings might not be optimal. (flushed=102 and evicted=0, during the time.)
I remember that this message also appeared in earlier MySQL 5.7 releases but somehow disappeared in later releases. I assume MySQL has just disabled the Note?