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Archived MySQL Articles
04 Mar 2017
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MySQL Enterprise Backup: improved logging messages [61184]
By Rahul Sisondia

Rahul blogs, "Logging is very important diagnostic tool for understanding the behavior of the application as well as troubleshooting any issue with the application. Since MySQL Enterprise Backup (MEB) is a command line application, there is little interaction with the myriad of operations going on behind the scenes. Thus, logging messages is very important in order to know the progress of current operation as well as learning more about errors should they occur. The messages logged by MEB are written to the console and the log file as depicted in the following diagram, which looks similar to the Tee command in UNIX..."
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04 Mar 2017
open to premium members only
Optimistic Incremental Backup [61185]
By Rahul Sisondia

Rahul blogs, "The current incremental backup algorithm scans all the tables to gather changed pages even if very few tables are modified since the previous backup and thus results in a 'full-scan' incremental backup. This may result in increment backups requiring the same amount of time as full backup because it scans all the tables. The new algorithm aims to eliminate this extra time.

The new algorithm scans only those tables that have been modified since the previous backup. This algorithm relies on modification time, which is similar to an earlier improvement made for full backup. That full backup algorithm is known as optimistic full backup, hence new improvement is named 'Optimistic Incremental Backup'. For comparison, we will use optimistic full backup to refer to the performance improvements for full backup and optimistic increment backup for the new improvements to incremental backup..."
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28 Feb 2017
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MySQL Connector/J 5.1.41 has been released [61189]
By MySQL Release Engineering

"MySQL Connector/J 5.1.41, a maintenance release of the production 5.1 branch has been released. Connector/J is the Type-IV pure-Java JDBC driver for MySQL.

Version 5.1.41 is suitable for use with many MySQL server versions, including 4.1, 5.0, 5.1, 5.4 and 5.5..."
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25 Feb 2017
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MySQL Support Engineer's Chronicles, Issue #5 [60957]
By Valeriy Kravchuk

Valeriy blogs, "A lot of time passed since my previous post in this series. I was busy with work, participating in FOSDEM, blogging about profilers and sharing various lists of MySQL bugs. But I do not plan to stop writing about my usual weeks of doing support engineer's job. So, time for the next post in this series, based on my random notes taken during the week here and there.

This week started for me with checking recent MySQL bug reports (actually I do it every day). I noted recent report by Roel, Bug #85065. Unfortunately it was quickly marked as "Won't fix", and I tend to agree with Laurynas Biveinis that this was probably a wrong decision..."
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17 Feb 2017
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ProxySQL 1.3.4 [60732]
By Rene Cannao, February 17th, 2017

Rene blogs, "I am happy to announce the release of the latest stable release of ProxySQL 1.3.4 on 18 February 2017.

ProxySQL is a high performance, high availability, protocol aware proxy for MySQL, with a GPL license! It can be downloaded here, and freely usable and accessible according to GPL license.

ProxySQL 1.3.4 is bug fixes release based on ProxySQL 1.3.3: no new features were introduced..."
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15 Feb 2017
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MySQL on Docker: Composing the Stack [60735]
By Severalnines, February 15th, 2017

Severalnines blogs, "Docker 1.13 introduces a long-awaited feature called compose-file support, which allow us to define our containers with a nice simple config file instead of a single long command. If you have a look at our previous 'MySQL on Docker' blog posts, we used multiple long command lines to run containers and services. By using compose-file, containers are easily specified for deployment. This reduces the risk for human error as you do not have to remember long commands with multiple parameters.

In this blog post, we'll show you how to use compose-file by using simple examples around MySQL deployments. We assume you have Docker Engine 1.13 installed on 3 physical hosts and Swarm mode is configured on all hosts..."
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