#DBHangOps 04/02/15 -- Getting Started with PERFORMANCE_SCHEMA and more!

Hello everybody!

Join in #DBHangOps this Thursday, April, 02, 2015 at 11:00am pacific (19:00 GMT), to participate in the discussion about:

• Getting started with PERFORMANCE_SCHEMA

  • What are issues P_S can help you find and fix faster?
  • How does P_S start to look under load?

• What's the hardest issue you've had to debug?

  • How did it initially manifest?
  • How did you discover it?
  • How did you resolve it?
  • Any bug reports come out of it?
• Percona Live 2015 is coming up! Are you presenting? What are you excited for?

You can check out the event page at …

This log buffer edition sprouts from the beauty, glamour and intelligence of various blog posts from Oracle, SQL Server, and MySQL.

Oracle:

Oracle Exadata Performance: Latest Improvements and Less Known Features

Exadata Storage Index Min/Max Optimization

Oracle system V shared memory indicated deleted

12c Parallel Execution New Features: Concurrent UNION ALL

Why does …

(この記事は InnoDB Full-Text : N-gram Parser を Yoshiaki Yamasaki が翻訳したものです)

デフォルトのInnoDB全文検索パーサー(構文解析プログラム)は、空白がトークン(語句)もしくは単語の区切りとなっているラテン語ベースの言語に対して理想的です。しかし、個々の単語の区切り文字が存在せず、それぞれの単語は複数の文字で構成できる中国語・日本語・韓国語(CJK)のような言語には向いていません。そこで、私たちは異なった方法で単語/トークンを識別する方法を必要とします。
私は今 …

While I try to keep things simple, sometimes eliminating options and explanations comes back to haunt me. After posting how to open a Fedora firewall port for a LAMP stack, somebody got trapped by my instructions for installing MySQL on Fedora. They got stuck because they had the following setting in their /etc/my.cnf file:

bind-address=localhost.localdomain

I’d suggested using that bind-address value for a DHCP VMware Fedora installation in Step #7. I was trying to create an example for an isolated testing instance, which is why I set the bind-address to a localhost.localdomain value. They raised the following error when they …

There are two models of load balancing: transport and application layer. HAProxy is a great TCP load balancer, but it’s lack of SQL awareness effectively limits its ability to address certain scaling issues in distributed database environments. In the open source world, there’s been a few SQL-aware load balancers, namely MySQL Proxy, ProxySQL and MaxScale, but they all seemed to be in beta status and unfit for production use. So we were pretty excited when the MariaDB team released a GA version of MaxScale earlier this year. In this blog, we’ll have a look at MaxScale and see how it compares with HAProxy.

Deployment

Installation is easy, at least on the latest LTS version of Ubuntu (Trusty, 14.04) which we used …

While we always want better performance and more and larger features for MySQL, those cannot just “magically appear” from one version to another, requiring deep architecture changes and lots of lines of code. However, there are sometimes smaller features and fixes that could be implemented by an intern or an external contributor, mainly at SQL layer, and that could make the MySQL ecosystem friendlier to newbies and non-experts. Making a piece of software easier to use is sometimes overlooked, but it is incredibly important -not everybody using MySQL is a DBA, and the more people adopting it, more people will be able to live from it, both upstream and as third party providers.

Here it is my own personal list of fixes for EXPLAIN messages. If you are an experienced MySQL user you are probably aware of their meaning, but that doesn’t solve the problem for beginners. The reason why I am writing a blog post is to gather …

After installing the LAMP stack on Fedora, you need to open port 80 in the Firewall to access the PHP programs on the Fedora instance from external servers. You can open a firewall port by launching the firewall-config application as the root user with the following syntax:

firewall-config

The firewall-config utility opens the following dialog:

Click on the Ports tab, and you’ll see the following:

…

My students wanted an extra credit assignment, so I thought a LAMP configuration and test would be appropriate. The only problem was I hadn’t added it to their course VMware instance. So, here are the instructions to install Apache2, PHP, and MySQLi for a complete LAMP stack when MySQL is already installed.

The post builds on my Fedora Install of MySQL and MySQL Workbench on Fedora posts from last year. It also presumes that you’ve installed a studentdb database but you need to know how to do that let me know (but it hasn’t changed much from the example at the bottom of this old MySQL 5.1 blog post).

You …

Here’s your chance to get on stage with Woz! Sort of. Apple co-founder and Silicon Valley icon and philanthropist Steve Wozniak will participate in a moderated Q&A on creativity and innovation April 14 during the Percona Live MySQL Conference and Expo in Santa Clara, California.

Woz once said that he never intended to change the world. That was the other Steve, Steve Jobs.

“I didn’t want to start this company,” Woz told the Seattle Times of Apple’s beginnings in a 2006 interview. “My goal wasn’t to make a ton of money. It was to build good computers. I only started the company when I realized I could be an engineer forever.”

What would you ask Woz if given the opportunity?

“Woz, what first sparked your interest in engineering?”
“Hey Woz, how did you come up with …

There are situations when you need to update the python-paramiko library that is bundled with MySQL Workbench. This may be because you prefer
using the latest cutting edge versions, are just curious, or you can’t wait for a new Workbench version.

To update, first download the latest python-paramiko release from https://github.com/paramiko/paramiko/releases. After downloading and extracting the archive, you’ll see a paramiko folder inside of the extracted folder. This folder needs to be copied into the appropriate MySQL Workbench folder on the system.

* For Windows, this location is usually
WB_INSTALLDIR/python/site-packages/paramiko

* For OS X, this will be
/Applications/MySQLWorkbench.app/Contents/Resources/Libraries/paramiko

* For Linux, you should use your repository manager (yum, apt-get, etc.), but …