I'm pleased to announce the release of Spider storage engine version 3.1(beta) and Vertical Partitioning storage engine version 1.0(beta).
Spider is a Storage Engine for database sharding.
http://spiderformysql.com/
Vertical Partitioning is a Storage Engine for vertical partitioning for a table.
http://launchpad.net/vpformysql

Please use the following for downloading binary file.
http://spiderformysql.com/download_spider.html

The main changes in this version are following.
Spider
- Add server parameter "spider_general_log" and "spider_log_result_errors".
- Add table parameter "force_bulk_update" and "force_bulk_delete".
- Add "spider_bka_mode=2" and "bka_mode=2". …

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We had a wonderful time during the Sept. 25 webinar, “MySQL 5.6 Configuration Optimization,” and I got a lot more questions than I could answer during the hour. So here is a followup with answers to the most interesting questions you guys asked. (You can also watch a recording of entire webinar here.)

Q: What is the impact of having innodb_stats_on_metadata=off in terms of seeing actual table size in information schema ?

A: In MySQL 5.6 this option if off by default. If you disable it in earlier version you will still see the actual table and index sizes as …

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MySQL is the leading database for web applications and the leading database for cloud. To facilitate your use of MySQL, start your learning by taking the MySQL for Beginners training course. 

This course covers topics permitting you to:

Describe MySQL GUI tools Describe the features and benefits of MySQL Explain the basics of relational databases Design an effective database Build a database and tables by using SQL Modify or delete database entities Query data with the SELECT command Join data from multiple tables Perform nested subqueries Use built-in MySQL functions Explain MySQL storage engines Explain database transactions Obtain database metadata Monitor database performance Perform database backup and recovery Export and import database data

You can take …

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Baron recently wrote about sending the query to the data looking at distributed systems like Cassandra. I want to take a look at more simple systems like MySQL and see how we’re doing in this space.

It is obvious getting computations as closer to the data as possible is the most efficient as we will likely have less data to work with on the higher level in this case. Internally MySQL starts add optimizations which help in this regard, such as Index Condition Pushdown which allow storage engine to do most rudimentary data filtering improving efficiency.

The more important case though is the Application – Database interaction. Modern applications often have quite complicated logic which might not map to SQL very well. Framework and the practices developers follow can only add to this problem. As results Application may be issuing a …

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There is a Debian MariaDB plan from the MySQL package team. There is good news as on September 30 2013, the upload to Debian unstable is complete with MariaDB 5.5 (5.5.32). It’s now only a matter of time before this becomes available in Debian. 

Its great to see the work of Otto Kekäläinen finally make it into Debian. I would say this has been in the works for seven months. Much thanks to James Page (Canonical) and Clint Byrum (HP, Debian Developer) for reviewing and uploading.

This joins the …

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On October 15 and 16 I'll take the ferry to be at the MySQL NoSQL Cloud conference in Buenos Aires, and the schedule looks really nice so far. I think it's a great opportunity for people in this region to get up to date with what's going on in the MySQL ecosystem, and to have good discussions with members of the community that aren't usually around here.

I still haven't decided my complete agenda, as in some cases it's difficult to pick one track and miss the other one, but for now, here are some highlighted sessions I'm definitely attending:

Related posts:

1. Presenting at Percona Live NY 2012 I’ll be attending Percona Live NY 2012 next month, co-presenting...
2. Using MySQL sandbox for testing …

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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 possible because you can dynamically change max_connections in a normal MySQL environment. However …

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I’ve previously shared my excitement over the coming Oracle Certified Professional exams for MySQL 5.6 (both Developer and DBA), and I’m putting my (employer’s) money where my mouth is – I’ve registered to sit for the DBA exam in early November (some test sites have limited opportunities; interested candidates should consider booking now).  Here’s why I think others should do the same:

Low cost

During the beta period (through December 14), the cost of the exam is only $50 USD.  That’s barely more than the cost of a book or study guide these days, and a significant savings from the normal exam prices.

Full certification

Those who pass the exam will be given a full certification – not some lesser “beta certification.”  There’s no distinction between those who …

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