Tag: Oracle

Deferrable constraints in Oracle 11gR2 may lead to corrupted data

I’ve hit a bug in Oracle 11.2.0.1 when working with deferrable constraints which I think is worth sharing as it may have profound consequences under certain scenarios.Here it is.

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Log Buffer #182, A Carnival of the Vanities for DBAs

This is the 182nd edition of Log Buffer, the weekly review of database blogs. Make sure to read the whole edition so you do not miss where to submit your SQL limerick!

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Hotsos Symposium 2010 — Battle Against Any Guess Is Won

What’s unusual about this session is that it’s not some technical stuff that I usually do but a more conceptual and motivational talk. Could I pull it off? Well, I think it went fairly well in general even though I did identify few rough places and my lack of English language mastering. Might need to work a little bit more on the flow of the presentation. We had quite a few good laughs. Later, people in the next hall were asking about it and Dan was making the jokes on the stage so it must have been loud. Anyway, I think nobody fell asleep and I managed to get people thinking about the topic. I received many “thank you” notes yesterday and compliments on a good session so by the end of the day I was more and more pleased. Thanks everyone for attending and especially big thanks to those of you who brought to my attention examples from their own battles. If you have more to discuss — contact me by email (my last name) {at} pythian.com.

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International Women’s Day

Start planning your blog posts for Ada Lovelace day now (March 24th) To that end, I would like to point out all the women currently in science and tech fields that I admire and think are doing great things. I think it would be great if everyone, male or female, made a list like this

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Oracle 11gR2 Grid Infrastructure — Memory Footprint

Upgrading to 11g Release Grid Infrastructure? You probably want to read on…

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Log Buffer #181: A Carnival of the Vanities for DBAs

The 181st edition of Log Buffer has been published by Gary Myers on his Sydney Oracle Lab.

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Live RAC SIG Web-cast Today: Oracle ASM 11g — The Evolution

ust a quick announcements…If you didn’t manage to attend my presentation, Oracle 11g ASM — The Evolution, during RMOUG or other conferences, you have a chance to see it online today. I’m doing it a web-cast at RAC SIG. It’s today, 4-Mar-10 at 12:00pm EST (9:00am PST).

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RAC+ASM 3 years in production. Stories to share (slides from RMOUG10)

Here are the slides from my presentation at RMOUG 2010. I am not sure how much sense all this will make without my comments. We may do it in a webinar if there is sufficient interest. Regardless I will probably be doing it again at some point in the future.

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Log Buffer #180: A Carnival of the Vanities for DBAs

Hello and welcome to Log Buffer #180. Time’s a-wastin’, so let’s go!

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IBM Storage Fails Too Often, so Let’s Switch to EMC…NOT!

A couple weeks ago I did a short blog post about SAN storage failures and how people are blinded by all the bells and whistles that are supposed to make storage arrays 100% reliable and failsafe. My conclusion was that there is no way to avoid storage failures, and that a better way is to anticipate those failures and be ready to handle them with minimal service impact.

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