ALL POSTS

Shared Nothing vs. Shared Everything: A comment from Kevin Closson

I just read a fascinating article on clustering architectures for databases from Kevin Closson of Polyserve (now HP). All I can say is that he has one of the most informed and incisive views and insights on clustering, SMP, high-availability and high-performance environments in the industry. I thought I would share this with the broader community because I think a lot of MySQL, SQL Server and EnterpriseDB folks who need to read this and think about this subject might otherwise miss it, simply because they may not be regular readers of Kevin’s blog.

Oracle 11g : I miss the price !

I rushed into my favorite book, Oracle Database Licensing Information – 11g Release 1. Guess what? We now have 4 new opportunities to do business with Oracle. I still miss the price list. As if you could look at a new Release without the price ;)

The good and the bad about bind variables, re-revisited in 11g !

It would not have been fair to show how Oracle 11g optimizer can now re-parse a query based on the execution statistics associated with a bind value compared to the previous executions of the same query with different bind values. It would not have been fair, to show you that without showing what happens when the second execution is faster that the first one, even with a sub optimal plan. This is what I’ll do now !

Basically, what is done in the example below it the opposite of what I’ve done in my previous post.

When 11g SQL is faster than 10g without any plan change…

To avoid being too far behind you guys that are already upgrading to 11g, I’ve decided to invest on 11g during the Beta Program. This has been a lot of fun and I wish I can share some of my findings with you. For example, did you know that 11g can go faster without any change at all ? The queries here will illustrate the change made to the Nested Loop Algorithm in 11g :

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