Until 2.1.1-beta the functions exposed in custom rankers for handling relevancy based on term frequency and Inverse Document Frequency (IDF) did not take field or document lengths into account. In 2.1.1-beta, Sphinx includes functions that take relevance ranking to the next level. New IDF functions mysql> SELECT * FROM myindex WHERE MATCH(‘less_common more_common’) OPTION RANKER= [...]

BE sure to attend the NOWG (Norwegian Oracle Users Group) conference (on a cruise ship) this April for presentations on Powerful EXPLAIN in MySQL 5.6 by Øystein Grovlen, What’s New in MySQL Server 5.6? by Geir Hoydalsvik, MySQL Query Optimizer: an overview by Jørgen Løland, and MySQL: An Introduction for Oracle DBAs also by by Øystein Grovlen.

There are no rules for blogging. There cannot be any, because you cannot trap the wind in your hands. It’s innovation, it’s creativity, and it’s right out of the core of the technology from the bleeding edge. This Log Buffer drips into that, and brings you some of the finest posts.

Oracle:

Yes its not a fad. Big Data is the commercial supercomputing in the age of Datafication.

Tanel Poder is listing Exadata storage cells and their configuration info from V$CELL_CONFIG.

How well do you know your hints? When Jonathan asks, it stays …

On April 3 at 10 a.m. PST, I’ll be giving a webinar titled “5 Percona Toolkit Tools for MySQL That Could Save Your Day.” In this presentation you’ll learn how to perform typical but challenging MySQL database administration tasks.

My focus will be on the following tools:

• pt-query-digest, to select the queries you should try to improve to get optimal response times
• pt-archiver, to efficiently purge purge data from huge tables
• pt-table-checksum/pt-table-sync, to check if data on replicas is in sync with data on the master
• pt-stalk, to gather data when performance problems happen randomly or are very short
• pt-online-schema-change, to run …

I've previously written about AppArmor and MySQL, and how to change MySQL's default file locations on systems with AppArmor enabled. Ubuntu and SUSE ship with AppArmor enabled, but some other distributions such as Oracle Linux don't, along with related distrubutions such as Red Hat, CentOS and Fedora. Rather, these other distributions use another mandatory access control system called SELinux. 

Here's some technical detail that might come in handy later.

SELinux uses concepts such as types and domains. Types belong to resources such as files and ports; these are the "objects" in SELinux. Domains contain the "subjects" (processes) and object types that are associated with each other in some way, for example because they are all related to …

It was in doubt but today it was confirmed that I'll be in Santa Clara in April for the MySQL conference hosted by Percona. This will be my 4th Percona conference and I'm delighted to be attending again. The Percona guys put on a great conference, nobody can deny them that. Although I'm not speaking at this year's conference, my esteemed colleagues will be. The recently awarded Oracle Ace for MySQL, Marco Tusa, Danil Zburivsky, Francisco …

I actually don’t remember exactly whether it was in 2006, 2007 or 2008 — but around that time the MySQL community had one of the greatest MySQL conferences put on by O’Reilly and MySQL. It was a good, stable, predictable time.

Shortly thereafter, the MySQL world saw acquisitions, forks, times of uncertainly, more acquisitions, more forks, rumors (“Oracle is going to kill MySQL and the whole Internet”) and just a lot of drama and politics.

And now, after all this time some 6 or 7 years later, it feels like a MySQL Renaissance. All of the major MySQL players are coming to the Percona Live MySQL Conference and Expo 2013. I am happy to see Oracle’s engineers coming with talks — and now with a great MySQL 5.6 release — and I have great …

If you haven’t explored the MySQL Performance Schema yet, this is a good place to start.  This is Performance Schema 101, a basic introduction to the MySQL 5.6 performance_schema, which records runtime statistics from the MySQL database. The performance_schema is intended to provide access to useful information about server execution while having minimal impact on server performance.  Performance_schema is the name of both the storage engine and the database itself, and it was initially implemented  in MySQL 5.5. In MySQL 5.6 the engineers added quite a bit of new instrumentation.

The performance_schema database uses views or temporary tables that actually use little to no persistent disk storage .Memory allocation is all done at server startup, so there is no ongoing memory reallocation or sizing, which is great for performance.

I categorize the performance_schema …

Agenda includes speakers from Calpont, Codership/Galera, Craigslist, MariaDB, SkySQL and the OpenStack Foundation

Today, SkySQL and MariaDB jointly announce an exciting lineup of speakers for their MySQL and Cloud Solutions Day on Friday, April 26th, at the Hyatt Regency Santa Clara. This year’s agenda will feature database and cloud tutorials, as well as keynotes, featuring speakers from Calpont, Codership, Craigslist, MariaDB, SkySQL and the OpenStack Foundation.

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Agenda includes speakers from Calpont, Codership/Galera, Craigslist, MariaDB, SkySQL and the OpenStack Foundation

Today, SkySQL and MariaDB jointly announce an exciting lineup of speakers for their MySQL and Cloud Solutions Day on Friday, April 26th, at the Hyatt Regency Santa Clara. This year’s agenda will feature database and cloud tutorials, as well as keynotes, featuring speakers from Calpont, Codership, Craigslist, MariaDB, SkySQL and the OpenStack Foundation.

read more