Free universe tool monitoring all database Is there any free tool to monitor most popular databases like Oracle, MySQL, MSSQL, PostgreSQL. I want to monitor the real time performance of all the above mentioned databases with a single tool like DBEAVER. But DBEAVER does not have real time monitoring facility.
Please suggest.
Thanks in advance.

Regards
Mahendra
Not that I'm fond of it, but if you use Nagios, it's rather easy to add some database-related plugins. You could do worse than have a look at:


PostgreSQL: Very useful. The latest versions are available at Bucardo.
MySQL: quite a few are available, make your pick. 
Oracle: but you'd better ask the Oracle experts.
MsSQL: I'm not using it yet but will test it soon.