MRP process on standby stops with ORA-00600

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A rather not so great post about an ORA-00600 error i faced on a standby database. Environement was 11.2.0.3 on Sun Super Cluster machine. MRP process was hitting ORA-00600 while trying to apply a specific archive log.

The error message was something like this

MRP0: Background Media Recovery terminated with error 600
Errors in file /u01/app/oracle/product/11.2.0.3/diag/diag/rdbms/xxxprd/xxxprd1/trace/xxxprd1_pr00_6342.trc:
ORA-00600: internal error code, arguments: [2619], [539], [], [], [], [], [], [], [], [], [], []
Recovery interrupted!

Some googling and MOS searches revealed that the error was due to corrupted archive log file. Recopying the archive file from primary and restarting the recovery resolved the issue. The fist argument of the ORA-600 is actually the sequence no of the archive it is trying to apply.

Writing tips

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Tim Hall has written some brilliant posts about getting going with writing (blogs, whitepapers etc). This post is the result of inspiration from there only. Tim says that just get started with whatever Winking smile.

If you are into blogging and no so active or even if you aren’t you may want to take a look at all the posts to get some inspiration to document the knowledge you gain on day to day basis.

Here is an index to all the posts by Tim till now

http://oracle-base.com/blog/2015/05/11/writing-tips-why-should-i-bother/

http://oracle-base.com/blog/2015/05/12/writing-tips-how-do-i-start/

http://oracle-base.com/blog/2015/05/13/writing-tips-writing-style/

http://oracle-base.com/blog/2015/05/14/writing-tips-how-do-i-stay-motivated/

http://oracle-base.com/blog/2015/05/15/writing-tips-dealing-with-comments-and-criticism/

http://oracle-base.com/blog/2015/05/18/writing-tips-should-i-go-back-and-rewrite-revise-remove-old-posts/

http://oracle-base.com/blog/2015/05/19/writing-tips-how-often-should-i-write/

Enjoy !

Want to learn Exadata ?

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Many people have asked me this question that how they can learn Exadata ? It starts sounding even more difficult as a lot of people don’t have access to Exadata environments. So thought about writing a small post on the same.

It actually is not as difficult as it sounds. There are a lot of really good resources available from where you can learn about Exadata architecture and the things that work differently from any non-Exadata platform. You might be able to do lot more RnD if you have got access to an Exadata environment but don’t worry if you haven’t. Without that also there is a lot that you can explore. So here we go:

  1. I think the best reference that one can start with is Expert Oracle Exadata book by Tanel Poder, Kerry Osborne and Randy Johnson. As a traditional book covers the subject topic by topic from ground up so it makes a fun read. This book is also no different. It will teach you a lot. They are already working on the second edition. (See here).
  2. Next you can jump to whitepapers on Oracle website Exadata page, blog posts (keep an eye on OraNA.info) and whitepapers written by other folks. There is a lot of useful material out there. You just need to Google a bit.
  3. Exadata documentation (not public yet) should be your next stop if you have got access to it. Patch 10386736 on MOS if you have got the access.
  4. Try to attend an Oracle Users Group conference if there is one happening in your area. Most likely someone would be presenting on Exadata so you can use that opportunity to learn about it. Also you will get a chance to ask him questions.
  5. Lastly if you have an Exadata machine available do all the RnD you can.

Happy New Year and Happy Learning !

VirtualBox and Windows driver verifier

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I was troubleshooting some Windows hangs on my Desktop system running Windows 8 and enabled driver verifier. Today when I tried to start VirtualBox it failed with this error message.

Failed to load VMMR0.r0 (VERR_LDR_MISMATCH_NATIVE)

Most of the online forums were asking to reinstall VirtualBox to fix the issue. But one of the thread mentioned that it was being caused by Windows Driver Verifier. I disabled it, restarted Windows and VirtualBox worked like a charm. Didn’t have time to do more research as i quickly wanted to test something. May be we can skip some particular stuff from Driver Verifier and VirutalBox can then work.

Oracle GoldenGate 11g Handbook

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Few months ago I contributed a chapter (on Monitoring, Troubleshooting and Performance tuning) to a GoldenGate book on Oracle Press that Robert Freeman was authoring. Thought of posting a small update that the book is now out. My name doesn’t appear on the main page Sad smile but you will see it in the Acknowledgements section Winking smile Below is a screenshot taken from Amazon preview Smile.

You may want to grab a copy if you are using/planning to use Oracle GoldenGate 11g.

Here is the link to the book page on Amazon. It seems the book is not published in India yet but one can order the imported edition on amazon.in

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