Tag: bind variables

If your system meets any of the following criteria: – Oracle 12.1.0.2.0 or higher – Partitioned tables – Parallel query heavily used – Bind variables in use, as they should be and, you’re seeing unusually high “cursor: pin S wait…

In this post I show you how to get SQL strings transformed in a way that resembles the result of cursor_sharing.

As we all know proper use of bind variables in SQL statements is a must to make transaction processing applications scalable. So how do we find the queries that don’t use bind variables and have to be parsed each time they are executed? There is number of ways, but this article is all about the most effective way I know. If you have a better one – let me know please!

No one has ever come out and formally asked me for a document that states “Best Practices to Scale Application X”. It is an unusual demand, since it’s something many of us at Pythian have implemented, but it’s been more of an ad hoc, iterative process — and rightly so, since architectures must be so organic, and so tailored to the application. What’s more, no one has ever brought us on board so early in the game that we have a hand in actually — gasp! — doing the design and data-model from the get-go. Woo hoo!