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Facebook’s Yoshinori Matsunobu on MySQL, WebScaleSQL & Percona Live
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Facebook’s Yoshinori Matsunobu

I spoke with Facebook database engineer Yoshinori Matsunobu here at Percona Live 2014 today about a range of topics, including MySQL at Facebook, the company’s recent move to WebScaleSQL, new MySQL flash storage technologies – and why attending the Percona Live MySQL Conference and Expo each year is very important to him.

Facebook engineers are hosting several sessions at

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Compile at CentOS 6.5 the new MySQL webscalesql-5.6.17 branch by Facebook, Google, LinkedIn, and Twitter
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http://webscalesql.org/

yeah , big buzz around that one :)

So I decided to check the install process:

1. Clone the repo from

root@webscalesql-5.6.clean:[Mon Mar 31 11:37:11][~]$ cd /opt/
root@webscalesql-5.6.clean:[Mon Mar 31 11:37:15][/opt]$ mkdir installs
root@webscalesql-5.6.clean:[Mon Mar 31 11:37:17][/opt]$ cd installs/
root@webscalesql-5.6.clean:[Mon Mar 31 11:37:19][/opt/installs]$ git clone https://github.com/webscalesql/webscalesql-5.6.git
Initialized empty Git repository in /opt/installs/webscalesql-5.6/.git/
remote: Counting objects: 30397, done.
remote: Compressing objects: 100% (12678/12678), done.
remote: Total 30397 (delta 18716), reused
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A conversation with 5 Facebook MySQL gurus
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Facebook, the undisputed king of online social networks, has 1.23 billion monthly active users collectively contributing to an ocean of data-intensive tasks – making the company one of the world’s top MySQL users.

A small army of Facebook MySQL experts will be converging on Santa Clara, Calif. next week where several of them are leading sessions at the Percona Live MySQL Conference and Expo. I had the chance to chat virtually with four of them about their sessions:

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Calvin Sun on MySQL at Twitter, Percona Live 2014 and Facebook
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Twitter’s Calvin Sun

Twitter’s Calvin Sun (@Calvinsun2012) is looking forward to the fast-approaching Percona Live MySQL Conference and Expo this April 1-4 in Santa Clara, Calif. He’ll be speaking, yes, but he’s also looking forward to learning from his peers – particularly those at Facebook. Both companies, he explained, are in the rather unique positions of unprecedented rapid growth and ever-expanding performance demands.

Calvin is a senior engineering manager at Twitter, where he manages MySQL development. Prior to that, he managed the InnoDB team at Oracle. Calvin also worked for

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Percona Live MySQL Conference and Expo 2014: Things I’m looking forward to
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The Percona Live MySQL Conference and Expo 2014 is just two months away. I’m very excited about this year’s event which continues our tradition of open technical discussions and inviting all parties to the table.

We have a great amount of technical talks from Oracle – I’m especially excited about future-focused talks shedding some light about what to expect in MySQL 5.7 and beyond. This content is best covered by developers actually designing the system and writing the code. We also have great coverage of MySQL

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on swapping and kernels
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There is much more to write about all the work we do at Facebook with memory management efficiency on our systems, but there was this one detour investigation in the middle of 2012 that I had to revisit recently courtesy of Wikipedia.

There are lots of factors that make machines page out memory segments into disk, thus slowing everything down and locking software up – from file system cache pressure to runaway memory leaks to kernel drivers being greedy. But certain swap-out scenarios are confusing – systems seem to have lots of memory available, with proper settings file system cache should not cause swapping, and obviously in production environment all the memory leaks are ironed out.

And yet in mid-2012 we noticed that our new kernel machines were swapping out for no obvious reason. When it comes to swapping, MySQL community will always point to Jeremy’s post on

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A sneak peek at the Percona Live MySQL Conference & Expo 2014
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Percona founder and CEO Peter Zaitsev delivers the opening keynote at Percona Live 2013 in Santa Clara, Calif.

MySQL gurus from Oracle, Facebook, Google, LinkedIn, Twitter, Yelp (and more) have submitted papers and will speak at the third annual Percona Live MySQL Conference and Expo 2014 in sunny Santa Clara, California this coming April 1-4.

If you attended last April’s Percona Live MySQL Conference and Expo – and/or last month’s Percona Live London 2013 conference – then you understand the value of learning from some of the world’s best and brightest system

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MariaDB-related links in November 2013
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Another month has come to an end. If you’re looking to be updated on MariaDB content on a regular basis, don’t forget to be on Twitter (@mariadb), Facebook (MariaDB.dbms), or Google Plus (+mariadb).

There was a question on Quora – Is Facebook considering ditching MySQL in favor of MariaDB like Google did? The best answer really comes from Harrison Fisk, so I’ll leave you to it to read. The older link made its way on social media about Wikipedia_$ mv MySQL MariaDB.

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New MySQL features, related technologies at Percona Live London
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The upcoming Percona Live London conference, November 11-12, features quite a number of talks about the latest MySQL features and related technologies. There will be a lots of talks about the new MySQL 5.6 features:

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Under the Hood at Facebook: MySQL Pool Scanner (MPS)
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My blog post about MPS on the Facebook Engineering blog has been published today!

This is a pretty amazing piece of automation that we've been building at Facebook for the past few years, and I'm excited to be able to speak about it in public.

Update: It is now also available at the new Facebook Code site.


Post by Facebook Engineering.
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