MySQLGlance

MySQLGlance is a lightweight mysql performance monitor tool , developed by parnassusdata.com . It will only focus on most important metric .

you can easily run it without any prerequisite. It will ask for few permission:

grant select on performance_schema.* to $USERNAME;
grant select,execute on sys.* to $USERNAME;
grant process on *.* to $USERNAME;
flush privileges;

MySQLGlance is free software , use it as you like.