Kevin Kempf's Blog

September 29, 2009

Using Custom Metrics in Enterprise Manager to Monitor Applications 11i (Part II)

Filed under: EM to monitor 11i, Enterprise Manager, Oracle — kkempf @ 3:26 pm

As I began to look at what was involved in monitoring custom metrics, I forgot how many steps it took to actually set up email notifications.   Therefore, I’m going to devote this Part II to notifications, and spell out some cool metrics in (yet) another future entry.  I should note before I begin here, that I’m not trying to be secretive about anything in the screen shots; if anything is blanked out (using the GIMP, by the way) in the images below, it’s most likely because it has personal or company information in it.

First step in receiving email notification is setting up an administrator account.  On the top right in EM, above the blue tabs, you need to click on Setup.Setup

Now click on Administrators on the bar on the left, and then the Create button.  This should get you to here:

Create an Administrator Account

Create an Administrator Account

Once your account is set up, you should confirm that your global SMTP settings are in place.  Click on Notification Methods on the bar on the left side of the screen

SMTP Setup

SMTP Setup

Note under Outgoing Mail (SMTP) Server, you need a fully qualified hostname or IP address of your SMTP server.  The Sender’s E-Mail Address is simply who will appear in the From field of the email you receive.

Now, log out and back in as the user you just created (I’m assuming this is you!).  Click on Preferences in the top right, and General in the bar on the left.  You should see the email address you just entered, as well as a preference for Message Format.  I recommend Short Format as most mobile devices don’t really have enough screen real estate to fit all the information it sends on Long Format.  While you’re here, you might as well click on TEST to ensure your SMTP and email settings are right – this should arrive in your Inbox in short order.

General Preferences

General Preferences

Next, lets set up the notification schedule.  On the left side, click on Schedule (you should already be under Preferences in the top right).  Select an administrator (you!) with the flashlight, and hit the Change button.    Since there is no schedule, the only button to hit is Define Schedule.   From here, you simply follow the bouncing ball, so to speak.  Rotation frequency is for shops where you may not be on the hook every week for after hours notifications or the like.  In my case, it’s a one-man operation, so I use a weekly rotation beginning “today”.  From the next screen, you need to fill in the hours you will be notified.  Again, in my case, it’s me or me, unless I’m on vacation.  So I just put in 12AM to 12AM and check Monday, Tuesday, Wednesday, Thursday , Friday, Saturday and Sunday, then hit the Batch Fill-In button.

schedule definition

Click finish and you’re almost there.  The last thing to configure is what you want to be notified about.  Again from the  Preferences selection in the top right, you now need to click on Rules.  The screen will look like this:

Notification Rules

You will notice that sysman owns the “canned” events, and you can choose to check Subscribe (Send E-mail) on any you wish.  In my case, I care about:

  • Agents Unreachable (indicative of host availability)
  • Database Availability and Critical States
  • Host Availability and Critical States
  • Listener Availability
  • User Defined Metrics

All of these are self explanatory, I believe, except the last.  In this case, I’ve created a category for my User Defined Metrics.  The easiest way to do this is select an existing category (Database Availability and Critical States works well) and click the Create Like button.  Under General call it User Defined Metrics.  Under Availability check what you’re interested in.  I’d recommend everything but blackout begin/end events:

Notification Rule2

From the Metrics tab is where you need to find your custom metrics.  Hit the Add button, then search (%User%) or click next (next, next…) for User-Defined Numeric Metric.

Notification Rule3

Once you add this, you can hit the Edit pencil on the right, and select exactly which User-Defined Metrics, on which database, you wish to monitor.  I’d also check Critical, Warning and Clear, just for good form.

Edit Metric

That’s a lot of ground covered!  At this point, you can test your User-Defined Metrics and ensure you receive notification when they fall out of tolerance.  Here’s a “gotcha”: as you add new User-Defined Metrics, they do not automatically get added to the selection in the Metrics screen, above.  Meaning you need to go back afterwards and manually add it/them to the already selected metrics, in order to be informed of a change in state on the new metric(s).

Next time: Some handy User-Defined Metrics with 11i, and how to monitor things at the OS level on the front end, such as the number of forms sessions and the availability of the Xvnc server (required for some reports)…

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