Hi Rockeis,
Here are answers to your questions:
1. This would depend on which version of MONyog you are using. MONyog 3.5 and earlier has an option called “Minimum interval between notifications” in Edit Server –> Notification Settings. MONyog generates alerts when this interval has elapsed. Newer versions of MONyog use a different concept: Counters are checked at every data collection, and alerts are sent immediately if a counter's value is above the threshold for a specified number of counts (specified by the option Edit Server –> Notification Settings : “Notify when alert-able _____ times”). Subsequent alerts for the same event are sent after another specified number of counts (specified by the option Edit Server –> Notification Settings : “Notify again after every _____ alert-able cycles”), to a max of 4 alerts.
2. MONyog sends them all in one e-mail itself.
3. Alerts for % of refused connections from MONyog means that MONyog was able to connect to the MySQL server successfully, and that the MySQL server was refusing too many other (not MONyog's) connections (perhaps because of invalid credentials, or an attempt at hacking?).
