ALL POSTS

Preventing runaway queries using Resource Governor

Section A (Theory) One of the typical reasons for performance issues is runaway queries executed by end users on a busy production database. This problem is fairly common in OLAP or shared systems (OLTP/OLAP) where business users begin executing complex (and often poorly written) queries, leaving their office for hours, and expecting their data to…

Why was SSHD refusing my key?

I was contacted by a colleague about a problem he was having. “I’m trying to set up something simple which I’ve done millions of times, but it’s not working. I might be missing something obvious.” The issue was that the SSH public key authentication didn’t work. The environment was running a virtualized Oracle Enterprise Linux 6.4…

Running JRE7 alongside JRE6 for Oracle Forms

DBAs working in a managed services environment often run into situations where some customers are still running JRE6 while others have upgraded to latest JRE7. When JRE7 is installed on a Windows desktop, it becomes the default JRE and gets invoked when users access Oracle forms. This creates all kinds of issues for users who…

Log Buffer #346, A Carnival of the Vanities for DBAs

Economist says that Physics suggest that storms will get worse as the planet warms. Typhoon Haiyan in Philippines, bush-fires in Australia, floods in China, and extreme unpredictable weather across the planet is a sober reminder. Good news is that technology and awareness is rising, and so is the data. Database technologies are playing their part…

Oracle RAC on the Cloud, Part 3

This is part 3 of a multipart series of getting oracle RAC running on a cloud environment. In part 1, we set up a NFS server for shared storage. In part 2, we set up OS components for each RAC server. Now we finish up the OS configuration and move to Oracle grid infrastructure.

Oracle RAC on the Cloud, Part 2

In part 1 of this series, we talked about some of the challenges of setting up Oracle RAC on a public cloud provider, and went on to order some VMs from provider Gandi, and finally configuring a NFS server for shared storage. In this post, we move on to configuring the rac servers themselves, rac01 and rac02.

Oracle RAC on the Cloud, Part 1

I’ve been working on moving a lot of the testing and R&D work I do away from local virtual machines and onto cloud environments, for a few reasons: I can avoid carrying around a laptop all the time, and rather log onto the cloud wherever I happen to be It’s easy to scale down and…

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