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October 2012

Pluggable 12c

For anyone looking for information on 12c, there are several posts about OpenWorld at the dbi Services blog (see links at right). In particular there’s a summary post about the “pluggable database” describing how you could plug a database into a “container” database, clone it inside the container database, then unplug it and put it somewhere else.

When I heard about the feature, it crossed my mind that there were two “obvious” targets for this technology that Oracle had in mind – in no particular order:

Knowledge Spreading at Work…

During my PhD our lab would have Friday meetings where we would take turns (3-4 people each week) to stand up and talk about scientific papers we had read recently. It was on a rota, so you only had to speak about once a month, but I truly hated it. I would go as far as to say I preferred taking my turn to clean the hot lab (the room we did all the radioactive stuff in), even if my mate Big Steve had spilt stuff all over the place, which he did on a regular basis…

Fast forward the best part of 20 years and I’m pretty comfortable with this whole speaking thing, so I suggested it might be a good idea if we start some type of regular meeting at work to help with the knowledge spreading. I spoke to Connor McDonald about this a few years ago. It was something he used to do in a previous company…

Exadata Storage Indexes Part III – Similarities With Database Indexes (Same Old Scene)

As discussed previously, there are quite a number of differences between Storage Indexes (SIs) and Database Indexes (DIs). However, there are also a number similarities between both of them as well. The obvious one is that they’re both designed specifically to reduce the overheads associated with retrieving the required data out of the database. Both index structures provides […]

ORA-00600: internal error code, arguments: [kmgs_component_init_3], [60], [65], [17], [], [], [], [], [], [], [], []

Recently I patched an 11.2.0.2 grid infrastructure to an higher version. After the patching I started the grid infrastructure on that host, and ASM was unable to start. Looking in the alert.log file of the ASM instance it turned out that upon starting ASM, even before the contents of the pfile/spfile was displayed, the ASM crashed with the ORA-00600 error:

Parallel DML and ODP.Net

I've been doing a lot of work around large volume data loads into an Oracle 11.2 database recently using External Tables and Parallelism and, despite the fact it's all used well-known techniques, I think it's probably worth a couple of posts to re-emphasise how successful using the right tools for the right job can be.

But first, we ran into a particular problem that threw us off-track for a few hours and this post covers that issue. I have a feeling that at least one person one day will land at this post via Google or from a vague memory of me writing about it and the hassle it saves them will make me smile!

My First Words About Oracle Exadata X3 In-Memory Database Machine

I’ve had countless emails from readers asking for a technical analysis of what Oracle announced at Openworld 2012 pertaining to the X3 refresh of Exadata Database Machine. I attended the show, fell ill and subsequently had a a lot of work backlog to clear. I will get to this next week and, not surprising to readers of this blog, I’ll take aim on  the following words: “Database In-Memory Machine” as they appear in the new marketing nickname for Exadata Database Machine.

Yes, I will blog the matter but would first like to recommend the following excellent blog posts by @flashdba as they relate to “Database In-Memory Machine”:

In Memory Databases Part I

In Memory Databases Part II

Repairman Jack : Nightworld…

Nightworld is (sort-of) the sixteenth book in the Repairman Jack series by F. Paul Wilson.

The days are getting shorter, the stars are changing and all hope is lost… Or is it?

Having thought that I had finished this series at book 15, it seemed a little daunting to start book 16, but I’ve made it my mission to finish this book as soon as possible. As I’ve mentioned a number of times, this is one dark series of books. I would go as far as to describe them as depressing. I do like the Jack character a lot, but my liking of him does not outweigh the toll this series of books takes on you. I feel like a need a course of Prozac now…

Whatever I read next, it better be bright and breezy!

Cheers

Tim…

Android Jelly Bean 4.1.2 on my Nexus 7…

I turned on my Nexus 7 last night and it asked if I wanted to upgrade to Android 4.1.2 (Jelly Bean). The install was pretty quick and went through with no dramas.

I’m not all that interested in the whole Android thing. To be honest, I can’t even be bothered to check the change log. It’s just an enabling technology for me, not something I’m passionate about. What I can say it that it has finally fixed the home page swivel issue. In case you hadn’t heard, the Nexus 7 automatically orientates the screen to whichever way you are holding it, except for the home page which always stays in portrait mode. Not any more. Finally it too can swivel.

I was never sure why this screen didn’t act like all the others, but it seems Google has responded to the criticism and sorted it.

Cheers

Tim…

Worth it

Yesterday I went to London to visit   Pewterers’ Hall, the base of The Worshipful Company of Pewterers (est. ca. 1450), to give a presentation at the Server Tech special interest group of the UK Oracle User Group.

I was on as the last event of the day, and the title of my presentation was “The Pessimist’s view of Exadata” – which, I have to say, starts with a slide where I point out that  I think Exadata is a wonderful piece of kit. Unfortunately I over-ran my time, but I had a reasonable stopping point so I stopped nearly on time, but said that if anyone wanted to stay on after the close of business I’d go through the rest of the slides.