OurSQL Episode 124: When Do You Want It?

This week, we talk about Linux I/O schedulers. Ear Candy is iotop, and At the Movies is learning how to use EXPLAIN.

OurSQL is taking the EBU's recommendation for volume for mobile devices. You can find a link to a white paper titled: "On the way to loudness nirvana".

Oracle is doing a small MySQL tech tour, on January 22nd to Pleasanton, CA and on January 23rd to Belmont, CA.

FOSDEM 2013 is taking place in Brussels, Belgium Sat Feb 2 - Sun Feb 3rd.

OSCON 2013 will take place in Portland, OR from Monday July 22nd through Friday July 26th. The call for speakers closes at midnight Pacific Time on Monday, February 4th.

LinuxFest Northwest will take place on Sat Apr 27th and Sun Apr 28th. The call for papers is open and you can submit proposals through Thursday Feb 28th.

Open Database Camp will be part of the Northeast LinuxFest at Harvard University, Cambridge MA Saturday March 16th and Sunday March 17th, 2013. You can register and submit presentations on the opensqlcamp.org website.

Percona Live: MySQL Conference and Expo 2013 is being held at the Santa Clara Convention Center Monday April 22nd - Thursday April 25th.

MySQL Marinate, a FREE basic MySQL training course led by Sheeri.

SkySQL Trainings

Oracle's MySQL Trainings

Percona Trainings

I/O Schedulers
An article on what a scheduler does and how it achieves it from the Waikato Linux Users Group from NZ.

Domas Mituas wrote a blog post making an analogy to elevators

Anticipatory scheduling

No-op scheduler

CFQ Scheduler


Deadline scheduler

Dimitri Kravtchuk performed extensive benchmarks of different Linux I/O schedulers and MySQL.

To change the scheduler on the sda disk to noop:
echo "noop" > /sys/block/sda/queue/scheduler

To check the scheduler on the sda disk:
cat /sys/block/sda/queue/scheduler

January 2007 interview with Jens Axboe about io schedulers.

Ear Candy

At the Movies
Sheeri doing a presentation on EXPLAIN, describing how to use EXPLAIN and a give a few optimization tips using examples.

Where you can see us

MySQL Marinate started January 1st, 2013. It is a virtual self-study course learning MySQL which both Gerry and Sheeri are leading. Even though it started last week, new members are accepted until Feb 1st.

Sheeri will be speaking at the miniconfs at Linux Conf Australia, about "Getting Started With a Podcast", "mysql security" and "The Art of Cat Herding: How to Manage Geeks." Linux Conf Australia will be held Monday January 28th through Saturday February 2nd, 2013 in Canberra.

Gerry will be at the February Seattle MySQL Meetup group on Monday February 11 2013.

Sheeri will be speaking at Rocky Mountain Oracle User Group Training Days in denver, colorodo from Monday Feb 11 - Thursday February 14th on "Backing up MySQL" and "Are You Getting the Most Out of Your Indexes?"

Sheeri will be speaking at SCALE 13 in Los Angeles from Friday, February 22nd through Sunday, February 24th on Are You Getting the Best Out of Your MySQL Indexes?

Sheeri will be speaking at Confoo in Montreal, Canada on Monday February 25 - Friday March 1, 2013, giving talks in English about "Are You Getting the Most Out of Your Indexes?" and "Different (MySQL) Forks for Different Folks".

Gerry will present a tutorial at Percona Live:MySQL Conference and Expo on Using TokuDB: A Guided Walk Through TokuDB Implementation. Many of the concepts apply to custom MySQL / MariaDB installations as well. Percona Live: MySQL Conference and Expo 2013 will be held April 22-25, 2013 in Santa Clara, California.

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