Tuesday Feb 21, 2012

Oracle Enterprise Manager Ops Center Doctor Utility - The Administrator's Companion

Oracle Enterprise Manager Ops Center comes with a very helpful little utility called Ops Center Doctor, or OCDoctor for short. This utility assists in various stages of the Ops Center deployment and can be a real life saver. It is updated on a regular basis with additional knowledge (similar to an antivirus subscription) to help you identify and resolve known issues or suggest ways to improve performance.

In this blog, I provide step-by-step instructions on how to install and use OCDoctor. At the bottom of the blog , you will find links to the recording of a live webcast on Thursday, February 23rd at 11:00 EST or 8:00 AM PST , when I will talk about OCDoctor live and answer questions .

Eran Steiner | Technical Architect

Oracle Enterprise Manager Ops Center Engineering | ORACLE

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Oracle Exadata Management — Diary of an Exadata DBA

I recently had the chance to sit down with Deba Chatterjee, Senior Product Manager, Database Manageability to talk about Oracle Enterprise Manager 12c and how it's making Oracle Exadata management easier for DBAs. He had a great analogy that I wanted to share. "To describe how Enterprise Manager is making Exadata management simple and less complex, is by using an approach we call, 'Exadata Aware Database Performance Analysis'. The best way to illustrate how this works, is to use real-world scenarios," Deba added. Here is one of those scenarios—an excerpt from the diary of an Exadata DBA.

November 15th, Late Evening

Database performance has suddenly dropped becoming very poor. The same reports that were running fine a couple of hours ago are now taking forever to complete. The boss just left me a message that the CRM analytics director was pretty upset and wants to know why we have a performance problem.

I checked the queries and the execution plans both look the same with lots of smart scans and cell offloading. Suddenly, the response time has gone south and I cannot figure out why?

My first step was to look at the database performance page in Oracle Enterprise Manager 12c, which now comes with built-in Oracle Exadata support. Hey, what do I have here in the I/O tab? The Exadata system health button is red, that's not good. What's happening? I clicked the button and it took me to the Exadata health triage page, this is where I can see if I have potential issues such as;

  • Load imbalance
  • ASM related problems
  • Cell software or hardware failures
  • Cell configuration issues
  • Network related failures


The red Oracle Exadata system health button indicates potential issues impacting database performance.

Next, I noticed that the network status was red, it must be a network issue, right? I quickly checked the administration screen in the Infiniband Target Home page, and saw we had a degraded port in the Port Details status section. I disabled the bad port and allowed the network traffic to automatically fail over to its peer. I'll have to look into this later, for now I just wanted to get the system up and running.


View of the degraded port in Infiniband Switch Schematic.

I quickly re-checked the Exadata system health status again, it showed all green—looks like everything was working, problem solved. I called my boss back to give him the good news that the database performance was back up. I sure am glad all these things are integrated; otherwise I would have been here all night trying to figure this out.

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