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Displaying posts with tag: Databases (reset)

MySQL Connect presentations on MySQL Fabric available on SlideShare
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Going to MySQL Connect was truly a blast. We got a lot of good questions and feedback in the sessions and there were a lot of interest in both MySQL Fabric and the MySQL Applier for Hadoop.

A big thank you to all that attended the talks, I got a lot of good questions and comments that will help us build good solutions.

The talks are available on SlideShare:





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An unexplained connection experience
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The “Too many connections” problem is a common issue with applications using excessive permissions (and those that grant said global permissions). MySQL will always grant a user with SUPER privileges access to a DB to investigate the problem with a SHOW PROCESSLIST and where you can check the limits. I however found the following.

mysql> show global variables like 'max_connections';
+-----------------+-------+
| Variable_name   | Value |
+-----------------+-------+
| max_connections | 2000  |
+-----------------+-------+
1 row in set (0.00 sec)

mysql> show global status like 'max%';
+----------------------+-------+
| Variable_name        | Value |
+----------------------+-------+
| Max_used_connections | 6637  |
+----------------------+-------+
1 row in set (0.00 sec)

How can the max_used_connection exceed max_connections? This is

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Learn MySQL for Free with MySQL Marinate, Season 3!
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The 3rd season of MySQL Marinate begins October 1st, 2013*. Join the meetup group and RSVP at season 3 to join! You can do the work on MySQL, or if you prefer, MariaDB or Percona.

If you do not have the book yet, you can still do the first week by using the online material from “Browse Contents” on the O’Reilly book page for Learning MySQL. There is homework for week 1, see the master list for all the information.

If you would like to learn MySQL from the ground up, consider joining us. This is for beginners – If you have no

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A friday MongoDB funny
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I had to laugh (just a bit) at this on the exhibitor floor at Oracle Open World 2013. There was a large MongoDB presence at the Slot 301. There are a few reasons.
First, the identity crisis remains. There is no MongoDB in the list of exhibitors, it’s 10gen, but where is the 10gen representation in the sign. 99.99% of attendees would not know this.
Second, the first and only slide I saw (as shown below), tries to directly compare implementing a solution to Oracle. The speaker made some comment but I really zoned out quickly. Having worked with MongoDB, even on one of my own projects, contemplated the ROI of being proficient in this for consulting, even discussing at length with the CEO and CTO, and hearing only issues with MongoDB with existing MySQL clients, I have come

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SQL to Hadoop and back again, Part 1: Basic data interchange techniques
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I’ve got a new article, which is part of a new three-part series, on moving data between SQL and Hadoop, both the export to Hadoop and importing processed content back into an SQL store.

In this first one, we look at the basic mechanics and considerations before you start the migration of data, such as the data format, content, and export techniques.

Read: SQL to Hadoop and back again, Part 1: Basic data interchange techniques


MySQL Puppet Module and Slides
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During yesterday’s MySQL Connect conference, Brandon Johnson and I gave a joint talk about how Mozilla uses puppet to manage hundreds of MySQL servers efficiently. We also released our mysql puppet module on github, so that all can benefit. The slides for the talk are at http://bit.ly/puppet-mysql-slides.

Upgrading to MySQL 5.6 Slides
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I am about to give a talk at MySQL Connect about what you need to know before upgrading to MySQL 5.6.

The PDF slides are online at http://bit.ly/upgrade56. I will be posting a video in the next few weeks!

A Brief Introduction to MySQL Fabric
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As you saw on the keynote, we are introducing an integrated framework for managing farms of MySQL servers with support for both high-availability and sharding. It should be noted that this is a very early alpha and that it at this point is not ready for production use.

MySQL Fabric is an integrated system for managing a collection of MySQL servers and is the framework on which high-availability and sharding is built. MySQL Fabric is open-source and is intended to be extensible, easy to use, and support procedure execution even in the presence of failure, an execution model we call resilient execution.

To ensure high-availability, it is necessary to have redundancy in the system. For database systems, the redundancy traditionally takes the form of having a primary server acting as a master and using replication to keep secondaries



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Second Madrid MySQL Users Group taking place tomorrow Thursday, 12th September
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If you happen to have some free time tomorrow and are in Madrid please come along to the second Madrid MySQL Users Group.

Details can be found here. The meeting will be in Spanish. I look forward to seeing you.

Video: Getting Started with Performance Schema
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Recently I gave a new talk to both the Tokyo and Boston MySQL User Groups about how to get started using performance schema. I have put some resources online for those interested:

Performance Schema talk video

PDF slides

The feedback has been excellent, so I hope that you find this video useful when trying to learn how to use performance schema and dive into the depth of the information it provides you.

10 Newer Entries Showing entries 61 to 70 of 1147 10 Older Entries

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