Oracle 12c Real Application Clusters Part 2: Performance Tuning, Administration and Backup

What should I do if my video will not play?

There are many things that can affect the quality of your video so we have put together these instructions to help you review all the things that need to be tested in order to trouble-shoot video quality.

The first thing we want to assure you is that we have done everything possible to make sure that our videos will play well.  Our videos are hosted in the cloud by Akamai.  Akamai has servers around the world to make sure that your videos are sent from the server that is closest to you.  By hosting our videos with Akamai we make sure that you receive the highest video quality. If you are experiencing video buffering or freezing at home or at the office there are a number of things you can do to help us troubleshoot.

  • Popup Blockers: Please check to make sure that your pop-up blocker is turned off when you go to our website. This will prevent the video window from opening.
  • Your Connection Speed: Internet speed needs to be 2.0 Mbps upload and download to successfully watch the videos.  You will want to check and see if your connection speed is 2.0 Mbps or higher.  You can do this by clicking on this link and running a speed test.
  • Jitter and Packet Loss: Your Jitter rate lets us know if your connection speed is consistent while your Packet Loss rate lets us know if your internet connection could be losing pieces of the video.
    • Go to to determine if there is any Jitter or Packet Loss on your connection.
    • This is measured by a letter scale with A being the best.
      • If your Packet Loss is below a B, your connection is losing pieces of the video and causing the video to skip.
      • If your Jitter is below a B, your connection speed is very inconsistent and may be changing while you are watching the video which will result in buffering issues.
      • If either of these is the case you will need to contact your internet provider.
  • Shared Internet Connection: If you are on a shared internet connection, test playing videos during non-peak hours when usage by others on your network is low.
  • Reset Your Browser: If you've tried all the previous steps, your browser may be retaining data that needs to be deleted, and this requires a reset. If you are using Chrome, use the instructions in this link to reset your browser. If you are using Internet Explorer (IE) you may need to reset it. You can do this by clicking on the cog icon on the top right of your page. Then click on tools, internet options, advanced and reset. If you are using Firefox, use the instructions in this link to reset your browser.
  • Other things to check:
    • At home or at work, test using different browsers and computers to see if you get the same result.
      • Make sure you have the latest version of the browser you are using.
    • If you are using Internet Explorer (IE) you may need to reset it. You can do this by clicking on the cog icon on the top right of your page. Then click on tools, internet options, advanced and reset.
    • Try from a different location using a different network.
    • If you are on a wireless connection try a wired solution.
    • If you are on a home network:
      • Test playing the videos when you are the only user on the network.
      • Try by-passing your router to eliminate it as the point of failure. A direct plug from your ISP to your computer will take care of this and will make sure that neither your router nor other users are affecting your connection.
    • If you are running Firefox, you can check your plugins here:
  • Make sure you do not have any other programs open. File sharing and peer to peer sharing programs, even when limited to low bandwidth, can make it almost impossible to stream properly.
  • Tracking Progress on Mobile Devices: The GogoTraining site is designed to use the native player found in your browser. If you are taking your course on a mobile device and want to make sure your progress is tracked, then you will need to play the videos from the native player that is in your browser. Do not download any third party apps to play the videos as they do not allow your progress to be recorded. If you have installed a third party app and want to receive a Course Completion Certificate, then you will need to uninstall the 3rd party app or see if the app has the ability for you to disable it for certain sites.
  • Submitting Debugging Information If you have tried everything else and still are having trouble viewing the videos, you can visit this page where you can help us debug your particular setup by following the instructions on the page and submit the debugging information to us.
Video Title
00: Course Introduction
5 min
01: System Requirements
17 min
02: Backup Oracle 12c
17 min
03: Lab Exercise and Solution: Configure RAC Archivelog
5 min
04: Lab Exercise and Solution: Backup Database
5 min
05: Tuning RAC
19 min
06: Lab Exercise and Solution: Run AWR Reports
9 min
07: Diagnosis RAC Issues
11 min
08: Lab Exercise and Solution: Diagnosis RAC
7 min
20 min
10: Lab Exercise and Solution: Use CRSCTL/OCRCHECK
8 min
11: High Availability of Services
17 min
12: Lab Exercise and Solution: Create and Use Services Container/Pluggable
7 min
13: RAC Node One
12 min
Quiz: RAC Node One
14: Node Management
19 min
15: Lab Exercise and Solution: Reducing the RAC
11 min
16: Lab Exercise and Solution: Extending the RAC
14 min
17: Application Continuity (AC)
15 min
Quiz: Application Continuity (AC)
18: Where Do You Go From Here?
1 min
3 hrs 39 mins

Steve Hamilton

Steve Hamilton, a consultant and database administrator, has over 20 years of practical experience with Oracle, Sybase and SQL Server. He is certified in Oracle version 8 through 11g and is a charter member of the Nebraska Oracle User Group. He also holds a MCITP SQL Server DBA/Developer certification, Linux certification and a Real Application Clusters (RAC) certification. Steve has consulted for many fortune 500 companies including ConAgra, FDR, Sitel and TDAmeritrade. Since 1995 he has taught nationally in cities such as Atlanta, Los Angeles, Chicago, Denver and New York. Through his experience using these products in both small and large organizations, Steve delights students by bringing 'real world' examples to the classroom. He enjoys preparing students so they can immediately be productive when they return to their work environment. He received a bachelor of science degree in business administration with a specialization in management information systems from the University of Nebraska at Omaha.

System Requirements


This course is taught using Oracle’s Virtual Box, however VMWare can also be used.   This course requires a minimum of two virtual machines because it is a clustered system. VMplayer may be downloaded from VMware at in the Desktop & End-User Computing section.

The specific hardware, broken down by Host requirements and guest requirements, are as follows:

Minimum Host Requirements
  • OS:                 Windows 7 or greater
  • Memory:         16g
  • Disk Space:    500g
  • Processor:      i5 or better
Guest Requirements
  • OS:                  Linux 5.5 or greater
  • OS:                  Windows 7 or better (Linux is preferred)
  • Memory:          6g each VM
  • Disk space:     50g
  • Processors:     Minimum 1 virtual processor, 2 preferred.
  • Oracle 12c Database for your respective OS either Windows or Linux
  • Oracle 12c Grid Infrastructure for your respective OS either Windows or Linux
These can both be download Select the appropriate version for your operating system.

Course Materials

When you purchase this course you will receive access to these materials.

  • Student Guide
  • Exercise Guide
  • Quiz Guide
  • Lab Setup Guide


This course comes with a Transcript that tracks your progress. You can use your transcript to view and monitor your progress and when you complete the course, you can print or email the transcript.

Certificate of Completion

You will be awarded a Certificate of Completion when you finish this course. You will be able to print or email the certificate and share your accomplishment with everyone.

How to Take Your Exam

This course, along with Oracle 12c Real Application Clusters Part 1: Installation and Configuration, prepares you to take exam 1Z0-432, Oracle Real Application Clusters 12c Essentials to earn the Oracle Real Application Clusters 12c Certified Implementation Specialist Certification.