I love Percona’s XtraBackup utility.  It’s basically a GPL answer to Oracle’s proprietary (and expensive) MySQL Enterprise Backup.  Percona claims that it has even more features that Enterprise Backup.  I do not have access to Oracle’s product, though, so I cannot evaluate that claim.

I have my backups set up in a particular way, for convenience and security.  I have a backup machine that has ssh access to the backup user on other machines.  It has terrabytes of spare disk space, and runs a script that uses rsync and other utilities to take backups of my other servers.

Since my backup server is where all backup scripts are run, I have previously used mysqldump to take a backup of one of my slave servers.  This worked well, but was …

We are excited to announce that IBM has partnered with Zend to offer a self-service Enterprise PHP platform on IBM SmartCloud PaaS. This IBM offering will ensure that IBM customers have a single point of contact for their application delivery requirements. IBM’s customers will get the benefits of Zend’s solution and expertise in enabling enterprise PHP, coupled with IBM’s innovation and support around the cloud, as well as the joint innovation, integration and support that the partnership delivers.

Highlights of the PHP Platform include:

- IBM & Zend have built self-service, ready-to-go Enterprise PHP application environments. These deployments are auto-scaling and fault tolerant out of the box.

- IBM is being …

Lately I have been working with a set of customers on a longer term basis which has given me time to explore new tools using their environments.  One tool that I am finding very helpful is called SchemaSpy.

SchemaSpy is a Java-based tool (requires Java 5 or higher) that analyzes the metadata of a schema in a database and generates a visual representation of it in a browser-displayable format. It lets you click through the hierarchy of database tables via child and parent table relationships as represented by both HTML links and entity-relationship diagrams. It’s also designed to help resolve the obtuse errors that a database sometimes gives related to failures due to constraints.

One of the …

Thanks.

I've retried with a 5.7.1 build with '-DWITH_DEBUG=1' and then lock_get_mode() works. I used a normal release tarball for the 5.6.10 release I tried.

And with "/4bt" instead of "/4t" the output looks similar to the example.

MySQL SystemQA: Testing MEB impact over MySQL Server features:

     MySQL SysQA team is responsible to test the MySQL Enterprise backup at a system level. Along with the System testing , SysQA team worked on MEB impact over MySQL Server features to ensure the new version of MySQl server is compatible with latest release of MEB.

What we do.

- Analyse each Server feature and findout if that impacts MEB.

- Run an Automated test that integrates the server functionalities along with MEB. The test is done in parallel with running server feature.

- Run the feature at each level of MEB run and verify if it works fine.

- Run the feature at different boundary conditions and verify the backup.

How we Did.

- Created a MultiThreaded program to run the MEB and Server feature in parallel.

- Run different transactions …

I recently had to do a backup of a 30 very large databases within a MySQL instance that had a total of 60+ databases.  I did NOT want to back up the other databases. In fact, the other databases had very large tables in them and I had very little disk space, so I could not afford to back them up. In this post I will share what I learned.

I’ve simplified the problem to illustrate the idea.  My goal in this post is to backup one database when an instance has many, with mixed InnoDB and MyIsam tables.

• I have 3 databases called dbtest1, dbtest2, and dbtest3, in one instance of MySQL .  I only want to back up  the tables in database dbtest2

• Each database has one InnoDB and one MyISAM table
• The InnoDB tables are quite large, and I have limited disk space …

MySQL 5th Edition by Paul Dubois

MySQL by Paul Dubois recently was reissued in a fifth edition. I purchased my first edition of this book more than a dozen years ago and it has become heavily dog-eared, festooned with Post-Its, and hand annotated over the years. It has proven to be the ‘go-to’ book when other books or the manuals did not explain to my satisfaction any questions that have popped up.

The author is part of the amazing MySQL Documentation Team for Oracle and certainly knows the subject. At 1,154 pages it is not light in weight nor light in detail. The chapters include ‘Data Types’, ‘Writing MySQL Programs using C’, ‘Security and Access Control’, ‘System, Status and User Variable …

You’ve just completed an upgrade from MySQL 5.5 to 5.6.  You followed the upgrade instructions in the manual, and ran mysql_upgrade.  But when you start MySQL 5.6, you still see the following error messages like the following in the server error log:

2013-03-26 16:45:51 5040 [ERROR] Column count of mysql.events_waits_current is w
rong. Expected 19, found 16. Created with MySQL 50520, now running 50610. Please
use mysql_upgrade to fix this error.
2013-03-26 16:45:51 5040 [ERROR] Column count of mysql.events_waits_history is w
rong. Expected 19, found 16. Created with MySQL 50520, now running 50610. Please
use mysql_upgrade to fix this error.

What went wrong?

Well, because mysql_upgrade is a client that’s built for a specific server version, it’s possible you have two …

Percona Server for MySQL version 5.6.11-60.3

Percona is glad to announce the first Release Candidate release of Percona Server 5.6.11-60.3 on June 3rd, 2013 (Downloads are available here and from the Percona Software Repositories).

Based on MySQL 5.6.11, including all the bug fixes in it, Percona Server 5.6.11-60.3 is the first RC release in the Percona Server 5.6 series. All of …

Many MySQL users are familiar with using slow query logs and tools such as mysqldumpslow to identify poor-performing SQL commands, and MySQL 5.6 introduces new powerful tools in PERFORMANCE_SCHEMA.  Both allow you to identify the date/time and the user account from which the command was issued, which is helpful – but if you’re using MySQL Enterprise Monitor (MEM), you can immediately identify the actual line of code responsible for the SQL command in question.  This happens to be one of my favorite and powerful features of MEM, but it’s frequently overlooked by new and experienced MEM users alike, so I’m writing the post to highlight it.

MySQL Enterprise Monitor, of course, is a commercial product that’s part of the MySQL Enterprise subscription.  But it’s freely-available under 30-day trial terms for evaluation from Oracle Software Delivery Cloud – if …