Once an advisor has been scheduled, it will run at set intervals. If it finds nothing of interest no alerts or emails will be created.

Events are defined using a number of different levels according to the severity of the alert. The seven levels are

For convenience, the event states are also represented by icons, as defined in the table below. The table also shows the relative level of the alert from the highest (Critical) to the lowest (unknown). The order represented here is used when identifying when an event has transititioned between levels (for example, from Success to Critical), hence triggering a notification, and when sorting events based on their current state.

Icon	Description
	An octagonal red icon indicates a critical alert.
	A triangular yellow icon a warning.
	A conversation bubble an informational alert.
	A green tick beside an event indicates that the rule has run successfully and no alert created.
	A question mark icon indicates that the status of the rule is unknown.

When alerts are triggered, they appear on the Events screen. Alerts also appear on the Monitor screen in order of severity. The notification group or groups associated with a specific rule receive email notification when an alert is triggered. For more information about creating notification groups see Section 15.5.5, “Manage Notification Groups”.

To view open events, click on the Events tab. The tree-view on the left determines which server or server group these events belong to. Open events are shown in tabular format.

Figure 15.44. MySQL Enterprise Dashboard: Events Screen

The event table has the following columns:

By default, all events are shown but the list of events can be filtered using the form displayed above the event list. The options include filtering by:

Choose the options you are interested in and click the filter button to refresh the display. You may limit the number of items that appear on a page by choosing a different value from the Limit drop down listbox.

The drop down list box showing severity has the options: All, Alerts, Critical, Warning, Info, Success, and Unknown. Selecting the option All shows all alerts and also those rules that have run successfully.

A successful rule is one that has not been violated and is indicated by a green tick icon.

The Alerts shows only those rules that have been violated.

Columns can be sorted by clicking on the individual column headings. The alerts shown in Figure 15.44, “MySQL Enterprise Dashboard: Events Screen”.

The server shown in Figure 15.44, “MySQL Enterprise Dashboard: Events Screen”, is filtered for All. Typically, when filtering by severity you would choose Alerts and, if you see a Critical, Warning, or Info alert, use the All filter to see when the rule last ran successfully. This may assist in determining the cause of the alert.

Besides filtering for severity, you can also choose to filter for a specific time period using the From and To text boxes. You also have the choice of filtering by specific rules or categories of rules. The Status drop-down list box let's you choose All, Open, or Closed events. To avoid excessive scrolling, you can also limit the number of events that show on a specific page.

For more information about an alert, click on the rule name. A pop-up window will appear showing a description of the alert and the exact time of occurrence. This pop-up windows provides links to useful resources and advice for resolution. You can also view the exact expression that generated the event.