We had a very successful weekend of Planet.mysql users submitting their database statistics so I’ve pushed some code into a new release today so that everyone can benefit from some new features. The biggest change is to the threading logic. Previously the benchmarking script was serializing MySQL operations and only making use of a secondary thread (not the invoking thread) to query the database. Now you have the option of running with “–threads=x” to make use of your multi-core server. A good example of this improvement was on my Macbook Pro; before the threading change it was inserting ~700/sec, after the code change I tried –threads=4 and saw an improvement to ~900/sec. Rather significant.

Download the new script now and see how your server compares to the ones in the …

Just a quick note to let everyone know that our new benchmarking script now supports OSX 10.6 on Intel hardware. That means you can run one simple command and get all of the sequential and random INSERT and SELECT performance statistics about your database performance. As usual the script is open source and released under the new BSD license. Give is a try by downloading now! See the download page for more details.

You can download the first release of the benchmarking script here: http://code.google.com/p/dbbenchmark/

Please read the README file or consult the Support page before running the benchmarks.

Welcome to DBbenchmarks.com, a publicly accessible database that tracks anonymously submitted data about MySQL server performance. You can use this site to see research the performance of certain types of hardware when running MySQL. Our open-source benchmarking script is free to own and use, we only ask that you allow the script to connect to this database and submit the results. All results and data collected is anonymous and viewable on this site. We only track performance data from MySQL – you can see the list on the About page.

Check out the database of benchmarks here: [link]

Open Query now has its own @openquery account on Twitter and Identi.ca so you can conveniently follow us there for announcements and tips – and also ask us questions! All OQ engineers can post/reply. The OQ site front page also tracks this feed.

Previously I was posting from my personal @arjenlentz account with #openquery hashtag, but that’s obviously less practical.

Sometimes we have some special need for a stored procedure to call another to do something. That is fine, but what if the second stored proc failed for some reason? Maybe you want to halt the first stored procedure (the caller) and not proceed with the work until the problem is verified and resolved. So How do you do it?

Simple, get a return code from the called procedure to determine if it worked or not!

Here’s a sample piece of code to explain better:


DROP PROCEDURE IF EXISTS `test`.`testing123`;
DELIMITER $$

CREATE
PROCEDURE `test`.`testing123`(OUT a INT)
BEGIN
DECLARE EXIT HANDLER FOR SQLEXCEPTION
BEGIN
SET a=2;
END;
SET a=0;

# toggle the below as comment or not to see the call at the bottom working
# if you uncomment select abc you'll see the error, otherwise all is cool

# select abc;

…

Pentaho’s Spoon is an open source ETL or Extract, Transform and Load tool that makes loading data from various formats into a MySQL server easy. Spoon also lets you check the data for problems and correct them before it gets inserted. It does a lot of things very well to make life easier for a DBA. So if people are entering their state of residence as ‘CA’, ‘Cal’, ‘Cal.’ and ‘California’ , Spoon can clean up the data to what you need.

What follows is an example of transforming a CSV file into a series on INSERT statements. It is a very simple transformation but is a good initial exposure to how Spoon functions. It then covers how to use Spoon with a bulk loading program.

There have been questions on the Calpont InfiniDB forums (http://www.infinifb.org/forums) on using Spoon to drive the cpimport bulk loader program. LOAD DATA INFILE can be slow (10,000 …

Around these days last year I presented `securich` for the first time. It was at froscon 2009, barely knowing anybody, spending my 27th birthday in a hostel in Germany fixing some bugs before the actual presentation on a 10 inch netbook (my mac had some problems at the time but thats another story :)). I got a beating, verbally of course! Many of the people listening to the presentation were expecting something else since another presentation was supposed to be running at that time, some even started dozing off (encouraging? not really hehe) but after a few minutes people started getting interested and asking all kind of questions. “This awesome” I thought to myself, “questions are good, it means people are understanding and want to know more”, but the more they learnt the more they realised how young securich was as a tool, lacking fundamental features like …

Hi MMM users.

On this post I just want to let you know that I will speak up at Froscon in Cologne, Germany next week (21st, August).

My speech will cover an architecture what I have used to "keep your mysql backend online, no matter what", what is the title of the presentation too.

This architecture includes MMM as a very important part of it.

Please visit the conference's website and join us there if you can.

www.froscon.de

Thanks to Martin Loschwitz, official Linux cluster stack Debian packages are now available for Debian lenny. Check out the the lenny-backports repository on backports.org (and your favorite local mirror).

When upgrading from Heartbeat 2.1.3, this webinar recording may come in handy. The webinar covers an upgrade to squeeze, but the upgrade procedure is identical if you’re staying on lenny.

…