Check manual page of mysql.innodb_io
MySQL InnoDB engine IO statistics
This check tracks the IO rate of the InnoDB database
engine for MySQL.
The data is gathered from the show global status query.
It allows you plan IO device capacity by seeing how much
is read and written by InnoDB, or to proactively generate alerts if
something is generating far too much write IO.
The configuration of this check is internally done as a "disk check" but
presented in as an application monitoring in WATO.
The check is configured like the diskstat check for block devices.
The check generates one item per instance, representing the InnoDB writers for a MySQL