Tag: Oracle

Presentations for Ottawa Oracle User Group

The Ottawa Oracle User Group (OOUG) was kind enough to invite me to give presentations for a whole morning. The group was ultra engaged and asked a lot of good questions, so my usual 50-minute Big Data presentation ended up taking 100 minutes, and the rest of the content had to be squeezed a bit. I hope everyone had a good time!

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Locks, Latches, Mutexes, and CPU Usage

So how is the actual “waiting on lock” implemented? How does session B, waiting for a transaction to commit started by session A, knows that the resource is free for use? To find out how it is implemented, I have traced Oracle foreground processes. I tried this on Oracle RDBMS 11.2.0.3 running on Linux. This is a excerpt of system calls being executed during a session waiting for a lock…

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Introducing a LinkedIn Group for SLOB Users

This is just a very short blog entry to inform folks that there is an open discussion group over at LinkedIn for SLOB topics of interest.

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The Exadata Installed Base, Quantified

Update 13-June-2012: It has come to my attention that the numbers from the original source may have been incorrect or improperly released. To avoid confusion and potentially misleading information, the original content of this blog post has been removed.

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Should your ADR be on Shared Storage?

I was on an Exadata environment with four RAC instances when a fellow DBA created an incident package. It was no big deal, except that part of the adrci packaging procedure was to take a backup of the controlfile and include it in the incident package. Though the package was created successfully, the controlfile never made it.

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My First Experience Running SLOB – ORION vs SLOB – 2:0

This posts finalizes a few weeks of work on comparing SLOB and ORION IO testing tools.

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My First Experience Running SLOB – Final Results – ORION vs SLOB

In this blog post, I will share the physical IO testing results I got by running SLOB and ORION on the same system and on the same disks. I will use those results as a reference in a few blog posts to come. As of now, I would like to make few points based in the results here.

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NoCOUG Contest Take #1: The Es-cu-el Spell

As heralded by Iggy Fernandez and Gwen Shapira, NoCOUG has launched its Third International SQL vs. NoSQL Challenge. Pythian is sponsoring the challenge, so I decided not to take part in the contest. However, I’m still having a crack at the problem just for fun. Here is my first take on it.

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Log Buffer #274, A Carnival of the Vanities for DBAs

Technical blogging has become more than just a way to tell the world what technologists did. It has become a vibrant medium through which the tech bloggers are sharing their experiences and teaching the interested audience. It has become an enabling technology. This Log Buffer Edition encompasses such vibrant blogs.

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Collaborate 12: Speakers I’d Like to Hear Again

The purpose of this blog post is to share my favorite speakers list from Collaborate 12 and give you hints on who you may want to listen to at future conferences.

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