… of these Web sites. TTY Access to Oracle Support Services … Oracle Enterprise Manager Grid Control Quick Installation Guide ? Oracle … Oracle Enterprise Manager Extensibility ? Oracle … Oracle® Enterprise Manager Framework, Host, and Third-Party Metric Reference Manual Oracle Enterprise Manager Framework, Host, and Third-Party Metric Reference Manual Oracle Enterprise Manager Framework, Host, and Third-Party Metric Reference Manual 10 g Release 2 (10.2) B16230-02 Copyright © 2007, Oracle. All rights reserved. The …

? A specific condition occurs. For example, an alert is triggered whenever an error message is written to a database alert log file. Alerts are detected through a polling-based mechanism by checking for the monitored condition from a separate process at regular, predefined intervals. Editing Out of the box, Enterprise Manager comes with thresholds for critical metrics. Warning and critical thresholds are used to generate an alert, letting you know of impending problems so that you can address them in a timely manner. To better suit the monitoring needs of your organization, you can edit the thresholds provided by Enterprise Manager and define new thresholds. When defining thresholds, the key is to choose acceptable values to avoid unnecessary alerts, while still being notified of issues in a timely manner. You can establish thresholds that will provide pertinent information in a timely manner by defining metric baselines that reflect how your system runs for a normal period of time. The metrics listed on the Edit Thresholds page are either default metrics provided by Oracle or metrics whose thresholds you can change. Specifying Multiple Thresholds The Specifying Multiple Thresholds functionality allows you to define various subsets of data that can have different thresholds. By specifying multiple thresholds, you can refine the data used to trigger alerts, which are one of the key benefits of using Enterprise Manager. The key in specifying multiple thresholds is to determine how the comparison relates to the metric threshold as a whole. What benefit will be realized by defining a more stringent or lax threshold for that particular device, mount point, and so on? For example, using the Average Disk I/O Service Time metric, you can define warning and critical thresholds to be applied to all disks (sd0 and sd1), or you can define different warning and critical thresholds for a specific disk (sd0). This allows you to adjust the thresholds for sd0 to be more stringent or lax for that particular disk. Accessing Metrics Using the Grid Control Console To access metrics in the Grid Control Console, use the All Metrics page associated with a particular target by doing the following: 1. From the Grid Control Console, choose the target. 2. On the target’s home page, click All Metrics in the Related Links section. 3. On the All Metrics page, choose the metric of interest and click Help. The help for that metric displays. See Also: See the Oracle Enterprise Manager Concepts manual and the Enterprise Manager online help for additional information about metrics, thresholds, and alerts …

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