Technical

jeremy.schneider's picture

Resource Manager Limits (ORA-29376)

So this is what happens when you hit that publish button too quickly – thanks Sayed for the feedback! A few corrections follow. :)


Just a brief post to mention a limit I’ve recently bumped up against. I couldn’t find any mention of this limit in the oracle docs or even on oracle’s support knowledge base. The only mention is in the text of a particular error message – I couldn’t find any further explanation or documentation.

Goal

Create a resource manager plan to guarantee fair scheduling between a large number of applications on a heavily consolidated 11.2.0.3 database. Create a consumer group for each application, put them all into a ratio-based plan so that each application gets an equal share of CPU under load.

Error

This is the error I received:

jeremy.schneider's picture

IOUG Collaborate 2013 Wrap-Up

By now the Denver Convention Center is probably cleaned up from IOUG Collaborate. The signs directing thousands of attendees to top-notch technical presentations have been removed, the twenty rental laptops which composed the classroom for Pythian’s RAC Attack class have been returned and the vendor exhibition floor has been completely cleared out. Flight delays notwithstanding (thanks to some midwest weather), attendees are generally home by now – even those coming from places as far away as Germany and Australia.

Now that the buzz is dying down, I’ve finally found a few minutes to post my personal highlights.

Friends Old and New

First off, my favorite part of Collaborate is the opportunity to meet so many old friends and make new acquaintances who are all using Oracle technology. It’s both fun and informative to hear about the ways others are using Oracle software.

jeremy.schneider's picture

IOUG Collaborate 2013 Wrap-Up

By now the Denver Convention Center is probably cleaned up from IOUG Collaborate. The signs directing thousands of attendees to top-notch technical presentations have been removed, the twenty rental laptops which composed the classroom for Pythian’s RAC Attack class have been returned and the vendor exhibition floor has been completely cleared out. Flight delays notwithstanding (thanks to some midwest weather), attendees are generally home by now – even those coming from places as far away as Germany and Australia.

Now that the buzz is dying down, I’ve finally found a few minutes to post my personal highlights.

Friends Old and New

First off, my favorite part of Collaborate is the opportunity to meet so many old friends and make new acquaintances who are all using Oracle technology. It’s both fun and informative to hear about the ways others are using Oracle software.

jeremy.schneider's picture

How To Troubleshoot OEM 12c Cloud Control Auto-Discovery

I was recently involved with an upgrade project to go from 11.2.0.2 to 11.2.0.3 on an Exadata V2. We hit some snags during the upgrade specifically related to OEM 12c Cloud Control. We performed an out-of-place upgrade and OEM 12.1.0.1.0 had some difficulty in dealing with this.

12c Cloud Control is supposed to run a daily check which looks for new targets on each server. When it finds something new, it places this in a queue to wait for admin approval. With a single click you can promote the newly discovered target into an OEM managed object.

jeremy.schneider's picture

How To Troubleshoot OEM 12c Cloud Control Auto-Discovery

I was recently involved with an upgrade project to go from 11.2.0.2 to 11.2.0.3 on an Exadata V2. We hit some snags during the upgrade specifically related to OEM 12c Cloud Control. We performed an out-of-place upgrade and OEM 12.1.0.1.0 had some difficulty in dealing with this.

12c Cloud Control is supposed to run a daily check which looks for new targets on each server. When it finds something new, it places this in a queue to wait for admin approval. With a single click you can promote the newly discovered target into an OEM managed object.

jeremy.schneider's picture

Set Up Exadata for Cloud Control 12.1.0.2

I recently helped setup an Exadata X2-8 Database Machine with the latest version of OEM Cloud Countrol (12.1.0.2). A few documents do exist for this process – the most useful of which are the Exadata Discovery Cookbook and the Setup Automation Kit. However I found a few inconsistencies and problems; I think the existing documents I found were written on older versions of OEM and older versions of the tools. Also there are some additional steps for older Exadatas which didn’t apply to my case.

jeremy.schneider's picture

Set Up Exadata for Cloud Control 12.1.0.2

I recently helped setup an Exadata X2-8 Database Machine with the latest version of OEM Cloud Countrol (12.1.0.2). A few documents do exist for this process – the most useful of which are the Exadata Discovery Cookbook and the Setup Automation Kit. However I found a few inconsistencies and problems; I think the existing documents I found were written on older versions of OEM and older versions of the tools. Also there are some additional steps for older Exadatas which didn’t apply to my case.

jeremy.schneider's picture

Adaptive Log File Sync: Oracle, Please Don’t Do That Again

Disclaimer: much that follows is pure speculation on my part. It could be completely wrong and I’m putting it out there in the hopes that it’ll eventually be proven one way or the other.

jeremy.schneider's picture

Adaptive Log File Sync: Oracle, Please Don’t Do That Again

Disclaimer: much that follows is pure speculation on my part. It could be completely wrong and I’m putting it out there in the hopes that it’ll eventually be proven one way or the other.

jeremy.schneider's picture

Lessons from Africa, Part 2

Last week was busy… making travel arrangements for this week’s trip to New York (technically Jersey) and some light analysis of AWR reports from exadata RAT runs and some heavy troubleshooting of a Solaris x86 RAC cluster with random node reboots. (I think I finally traced the node reboots to a kernel CPU/scheduling problem). I really did thoroughly enjoy my time in Africa despite being nowhere near Oracle software – but it feels good to be working on challenging cluster problems again!

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