Skip to main content

High Performance PL/SQL

PL/SQL is a key enabling technology in Oracle Database. You should make sure that you are aware of and take advantage appropriately key features of the PL/SQL language focused on performance.

I offer a short list of those features below, along with links to related resources. Most of this is also capture in this slide deck:



Key Performance Features

All of these are covered in the slide deck above; the links will take you to the documentation on these features. Click here for the overall section in the doc on performance and optimization.
But Don't Forget About SQL Optimization

Chances are you could take full advantage of all the features listed above and more in PL/SQL, and still end up with a slow application. That's because at the heart of every application built on Oracle Database are your SQL statements, and if those are not optimized, you can pretty much forget everything else.

Here are some links you might find helpful in this regard:

(list under construction - please offer your suggestions in Comments)

Labels:

Comments

Post a Comment

Popular posts from this blog

Why DBMS_OUTPUT.PUT_LINE should not be in your application code

A database developer recently came across my  Bulletproof PL/SQL  presentation, which includes this slide. That first item in the list caught his attention: Never put calls to DBMS_OUTPUT.PUT_LINE in your application code. So he sent me an email asking why I would say that. Well, I suppose that is the problem with publishing slide decks. All the explanatory verbiage is missing. I suppose maybe I should do a video. :-) But in the meantime, allow me to explain. First, what does DBMS_OUTPUT.PUT_LINE do? It writes text out to a buffer, and when your current PL/SQL block terminates, the buffer is displayed on your screen. [Note: there can be more to it than that. For example, you could in your own code call DBMS_OUTPUT.GET_LINE(S) to get the contents of the buffer and do something with it, but I will keep things simple right now.] Second, if I am telling you not to use this built-in, how could text from your program be displayed on your screen? Not without a lot o...
4 comments
Read more

The future of Oracle PL/SQL: some thoughts on Sten Vesterli's thoughts

Sten Vesterli published a very thought-provoking post on his blog: Please stop reading this post, and read that one. When you are done, come on back here for my thoughts on Sten's thoughts. OK. You read it. Here we go. First, thanks, Sten, for being such an interesting, wise, sometimes provocative voice in our community. Next, Sten writes: Now, on the one hand, I certainly agree that the vast majority of young developers are currently caught up in the modern version of a Gold Rush, which is: "Build an app using JavaScript, pay no attention to that database behind the curtain." But I can assure you that I still do meet young PL/SQL programmers, regularly, when I am at conferences and doing onsite presentations at companies. So, young person who writes PL/SQL: do not be afraid! You are not alone! And you are super-smart to have made the choice you did. :-) Next, Sten offers this advice to managers: I agree that PL/SQL is a "spec...
46 comments
Read more

Table Functions, Part 1: Introduction and Exploration

Please do feel encouraged to read this and my other posts on table functions, but you will learn much more about table functions by taking my Get Started with PL/SQL Table Functions class at the Oracle Dev Gym. Videos, tutorials and quizzes - then print a certificate when you are done! Table functions - functions that can be called in the FROM clause of a query from inside the TABLE operator - are fascinating and incredibly helpful constructs. So I've decided to write a series of blog posts on them: how to build them, how to use them, issues you might run into. Of course, I am not the first to do so. I encourage to check out the  documentation , as well as excellent posts from Adrian Billington (search for "table functions") and Tim Hall . Adrian and Tim mostly focus on pipelined table functions, a specialized variant of table functions designed to improve performance and reduce PGA consumption. I will take a look at pipelined table functions in the latter part...
31 comments
Read more