In recent time, MariaDB 10 has been getting many new storage engines. We’ve seen TokuDB, CONNECT, SEQUENCE, SPIDER, CassandraSE for various use cases. For a long time, MariaDB shipped OQGRAPH, but it was disabled in MariaDB 5.5. It will make a come back as OQGRAPH v3 has been worked on actively by Andrew McDonnell. Keep track of this via MDEV-5319.

Another engine being worked on by Kentoku Shiba & team is the mroonga engine, which allows you to do full text search. It is optimised for CJK languages, and is supposedly very fast. To track this, follow …

Thousands of people have testified to the value of the Oracle Certification Program as follows:

• 97% said they have benefited from certification.
• 96% would recommend the program to a professional colleague.
• 89% said they gained more confidence in their expertise after becoming certified.

You have until December 21st to take the new MySQL Server 5.6 Certification exams in their beta form. A reminder of what is on offer:

• Oracle Certified Professional, MySQL 5.6 Developer
• Oracle Certified Professional, MySQL 5.6 Database Administrator

Until December …

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. …

This is an incomplete fragment from 2011. Figure its worth publishing this now, considering MariaDB is likely to get groonga in the near future. The groonga team have released MariaDB 10.0.6 binaries as well. This is all part of the mroonga project.

These were my quick notes from the groonga talk at the O’Reilly MySQL Conference & Expo 2011. I haven’t tried it yet (and don’t know if it really is faster than Sphinx), but its something I definitely want to play with. Maybe even get a MariaDB tree going.

groonga is a fulltext search library for cloud & web.

groonga is easy to embed & is scalable. It is written in C.

Highly precise search for …

Today new version of JSON UDF functions: 0.2.1 was released. This is maintenance release which added no new functionality and only contains bug fixes. However, it also includes improvements for build ans test procedures. As usual, you can download source and binary packages at MySQL Labs. Binary packages were build for MySQL server 5.6.14. If you want to use other version of the server, you need to recompile functions.

What was changed? Let me quote the ChangeLog.

Functionality added or changed:

Added cmake option WITH_PCRE which alolows to specify if existent or bundled version of PCRE  should be used. Bundled is default on Windows. To compile with bundled version, run: "cmake . -DMYSQL_DIR=/path/to/mysql/dir -DWITH_PCRE=bundled", to turn bundled version off on Windows, run: "cmake . …

I took the MySQL 5.6-Exam today and it really is not easy. Lets get straight to the facts i remember:

• I had 130 questions and 180 minutes time
• I needed 155 minutes but i was a bit exhausted at the end so went a bit quicker through the questions as in the beginning. Normally i am a fast exam taker and only need a third of the time.
• The option to eliminate obviously wrong answers by CTRL-Rightclick is often really helpful

What you should learn in the following order:

• Performance Schema
• Replication Features, especially GTID, and mysqlbinlog-usage
• Partitioning
• Optimizing MySQL Queries
• MySQL Enterprise Backup-Features
• Anything else (command line options, Windows Cluster, mysqldump, mysqlshow, etc..)

I had 3 or 4 questions where i thought that the answers (or the question) were not correct or no …

So, after installing Workbench 6.0.7 on my pc, and playing around with the MySQL Utilities that are included, I thought I’d do similar to what others have done (Thanks Tony D.) and share my experience on how I’ve used them. If you haven’t installed Workbench before, you might want to check your platform first: http://www.mysql.com/support/supportedplatforms/workbench.html.

So, even if you’re not using any of the recent versions and editions of Workbench (Utilities comes with all of them, Tools menu -> “Start Shell for MySQL Utilities“) you can just download the standalone scripts on a Linux machine. Flexibility being the name of the game again. …

So, after installing Workbench 6.0.7 on my pc, and playing around with the MySQL Utilities that are included, I thought I’d do similar to what others have done (Thanks Tony D.) and share my experience on how I’ve used them. If you haven’t installed Workbench before, you might want to check your platform first: http://www.mysql.com/support/supportedplatforms/workbench.html.

So, even if you’re not using any of the recent versions and editions of Workbench (Utilities comes with all of them, Tools menu -> “Start Shell for MySQL Utilities“) you can just download the standalone scripts on a Linux machine. Flexibility being the name of the game again. …

I took a quick look at MariaDB 10.0 single-treaded performance (simple read-only sysbench). One thing immediately leaps to the eye, and I thought it worthy of mention. It contains an important lesson about the use of synchronisation primitives and in particular "atomic operations" in MariaDB (and MySQL).

I am using the Linux perf tool on this sysbench command:

  sysbench --num-threads=1 --test=oltp --oltp-test-mode=simple --oltp-read-only --oltp-skip-trx

Look at the top offender in the output from perf report:

  1,54%  mysqld  mysqld               [.] set_thread_state_v1

The only thing this does is set a string for SHOW PROCESSLIST (and the like) about what the thread is doing. And we are spending a whopping 1.5% of the total time doing this.

And why? That becomes clear when looking at the disassembly …

We have always received quite few questions here at Percona Support on how to avoid the dreaded “Too many connections” error, as well as what is the recommended value for max_connections. So, in this article I will try to cover best possible answers to these questions so others can mitigate similar kinds of issues.

My colleague Aurimas wrote a wonderful post some time back about changing max_connections value via GDB when MySQL server is running to get rid of the “Too many connections” error without restarting MySQL. You can check here for details.

By default 151 is the …