view counter

MySQL Feed

Oracle MySQL resources, news, and support articles.

Chance to give your views on MySQL Cluster 7.2 content

The MySQL Cluster 7.2 Development Milestone Release has been out for a while now and we’d love to hear which are your favourite features – it t

Error injection tests for InnoDB would be nice

I am trying to figure out why an InnoDB table was lost when a DDL statement failed. I think it was a RENAME TABLE statement. I have yet to find the root cause but I did find that InnoDB doesn't report some errors when RENAME fails so the user thinks that the table was renamed, the FRM file is renamed, and the ibd file is not renamed. This is only a problem for files not in the InnoDB system tablespace so --innodb_file_per_table=1 must be used. This is bug 64144.

MySQL Configuration Wizard Updated

We’ve released an updated version of the MySQL Configuration Wizard we announced at the end of last year. If you don’t remember that announcement, here’s the short version: this is a tool to help you generate my.cnf files based on your server’s hardware and other characteristics.

We’ve gotten really good feedback on this tool, including this nice mention on Stack Exchange:

Syntax of the day: IS TRUE and IS FALSE

What makes for a true statement?

We usually test statements using a WHERE clause:

SELECT * FROM world.City WHERE Population > 1000000

The "Population > 1000000" statement makes for a boolean expression. Using WHERE is just one way of evaluating it. One can also test with IF():

How to recover a single InnoDB table from a Full Backup

Sometimes we need to restore only some tables from a full backup maybe because your data loss affect a small number of your tables. In this particular scenario is faster to recover single tables than a full backup. This is easy with MyISAM but if your tables are InnoDB the process is a little bit different story.

Schedule for MySQL Conference 2012 is Published

I am pleased to announce the schedule for Percona Live: MySQL Conference And Expo 2012 is now published. This is truly great selection of talks with something for MySQL Developers, DBAs, Managers, people just starting to use MySQL as well as looking for advanced topics. We have talks about running MySQL on extremely large scale in a Web as well as running MySQL In the Enterprise Environments. 2012 roundup

I spent last week at in Ballarat, Victoria (that’s the Victoria in Australia, not wherever else there may be one) which is only a pleasant two hour drive from my home town of Melbourne (Australia, not Florida). I sent an email internally to our experts detailing bits of the conference that may interest them – and I thought that it may also interest our wider readers who are interested in all levels of the software stack.

Preventing MySQL Emergencies Webinar

On the 25th of January at 10 am PST, I will present a webinar on preventing MySQL emergencies titled “Preventing Downtime in Production MySQL Servers”. The material I will present is based on in-depth research done by Percona across many production servers.  We analyzed more than 150 emergency cases and categorized our findings to help you learn ways to avoid production downtimes. Join us to learn more about why emergencies happen (it may be different than what you think) and what you can do to avoid them.

Exciting upcoming MySQL events

At the IOUC leaders’ summit in San Francisco this week, key leaders from Oracle, Java and MySQL user groups world wide have been meeting. This has included the key Oracle MySQL resources from the community, marketing and product teams. The Java User Groups and MySQL User Groups have been well represented and there has been very welcoming discussion with the IOUC about how we can become active within the Oracle Community.

What Are Full, Incremental, and Differential Backups?

Sometimes you might hear people talk about full backups, and differential backups versus incremental backups. What is the difference?

A full backup is pretty self-explanatory. It makes a copy of all of your MySQL data.

view counter