info on mysql

[PRATIKSHA JAISWAL]

Hi All,

How can i get following information from database or is there any query for
the same.

(1) mysql server uptime
(2) Total number of users connected to server
(3) Data file information / where it is located through mysql prompt / size
of data file
(4) each Database size
(5) Database I/O information
(6) Invalid object in database
(7) Database performance statistics queries
(8) Top 5 queries taking more time for executions.
(9) Engine information.


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Thanks
Pratiksha