MySQL Backup system schemas (1 reply)

Hi When we configure backup for MySQL , do we need following schema to backup as a best practise .

information_schema, mysql, performance_schema, sys-
Q1. In case we need to restore information_schema, then will oversight existing meta data . Do you thing its normal.
q2.Backing up following schema would be best practise ?
Q3. While backing up information_schema im getting following error. But backup was done.

mysqldump: Dumping 'information_schema' DB content is not supported

What is the alternative way of doing it.

thanks