MySQLGlance is a lightweight mysql performance monitor tool.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;
MySQLGlance is free software , use it as you like.
download url : https://sourceforge.net/projects/mysqlglance/