Welcome to a new weekly column on the Percona blog. My name is Colin Charles, Percona Chief Evangelist, and I have been involved in MySQL, MariaDB Server and the open source community for over a decade. Now I am at Percona, and this is my weekly column.

When you start a column, you have ask yourself what you’ll be writing about. Keeping the focus on the reader is what’s crucial. With this in mind, I plan to cover happenings, pointers and maybe even musings in this column. It’s August, and while many are away on summer vacations, there’s still plenty happening in the database world. So maybe this will be a little like the now-defunct, Weekly MySQL News. It will be broader than just MySQL, however, and focus on open source databases (after all, Percona’s mission is to …

TL;DR: we still need MyISAM and myisampack because it uses less space on disk (half of compressed InnoDB) !

In the previous post, I shared my experience with InnoDB table compression on a read-only dataset.  In it, I claimed, without giving much detail, that using MyISAM and myisampack would result is a more compact storage on disk.  In this post, I will share more details about this claim.

In this blog post, we’ll look at some tips on how to configure Aurora RDS parameters.

I was recently deploying a few Aurora RDS instances, a process very similar to configuring a regular RDS instance. I noticed a few minor differences in the way you configure Aurora RDS parameters, and very few articles on how the commands should be structured (for RDS as well as Aurora). The only real literature available is the official Amazon RDS documentation.

This blog provides a concise “how-to” guide to quickly change Aurora RDS parameters using the AWS CLI. Aurora retains the parameter group model introduced with RDS, with new instances having the default read only parameter groups. For a new instance, you need to create and allocate a new parameter group (this requires a DB reboot). After that, you can apply changes to …

This blog discusses newly added options for Percona XtraBackup 2.4.8 and how they can impact your database backups.

To avoid issues with MySQL 5.7 skipping the redo log for DDL, Percona XtraBackup has implemented three new options (

xtrabackup --lock-ddl

,

xtrabackup --lock-ddl-timeout

,

xtrabackup --lock-ddl-per-table

) that can be used to place MDL locks on tables while they are copied.

So why we need those options? Let’s discuss the process used to get there.

Originally, we found problems while running DDLs: Percona XtraBackup produced corrupted backups as described in two reports:

• …

What’s New in MariaDB Connector/J 2.1 RalfGebhardt Mon, 08/07/2017 - 13:27

We are pleased to announce the general availability (GA) of MariaDB Connector/J 2.1, the newest version of MariaDB Connector/J for Java 8+. 

MariaDB Connector/J 2.1 is fully compatible with MariaDB Connector/J 2.0, so version 2.0.3 was the last maintenance release for 2.0 and will be replaced by version 2.1 moving forward. MariaDB Connector/J 2.1 includes the following new enhancements:

Security

MariaDB Connector/J 2.1 adds verification of SSL certificate name mismatch functionality. When using SSL, the driver will check the hostname against the server's identity as presented in the server's certificate (checking alternative names or certificate CN) to prevent man-in-the-middle attacks.

A new option "disableSslHostnameVerification" can be …

The MariaDB project is pleased to announce the immediate availability of MariaDB 10.0.32, as well as the recent releases of as MariaDB Connector/ODBC 3.0.1 (beta), MariaDB Connector/J 2.1.0 and MariaDB Connector/J 1.6.3. See the release notes and changelog for details. Download MariaDB 10.0.32 Release Notes Changelog What is MariaDB 10.0? MariaDB APT and YUM Repository […]

The post MariaDB 10.0.32 and Connectors now available appeared first on MariaDB.org.

In this tutorial, we will install MySQL with phpMyAdmin along with Apache web server with PHP 5.6. MySQL is a free and open source relational management system. It stores data in tabular format. It is the most popular way of storing the data into the database. phpMyAdmin is also a free and open source application used to administrate a MySQL server instance through a rich graphical user interface.

In my last post about big MySQL deployments, I am quickly mentioning that InnoDB compression is allowing dividing disk usage by about 4.3 on a 200+ TiB dataset.  In this post, I will give more information about this specific use case of InnoDB table compression and I will share some statistics and learnings on this system and subject.  Note that I am not covering InnoDB page compression which is

Today is my last day in Asia (China and Taiwan), and between the sessions I had the time to code a small proof-of-concept for people that are asking how they could read their writes on all nodes and ensure the read consistency with their last write ?

The usual (and easier) answer to this particular question is to read on the same host you just wrote. But currently MySQL provides you all the elements to force a consistent read across all the nodes of a group.

Since MySQL 5.7.5, we introduced session_track_gtidsand in 5.7.6 we also introduced  GTIDs context to the OK packet (session tracker) (WL#6128 and WL#6972). So we can use this implementation in …

One of the new graphs added to Percona Monitoring and Management (PMM) is saturation metrics. This blog post explains how to use the information provided by these graphs.

You might have heard about Brendan Gregg’s USE Method  (Utilization-Saturation-Errors) as a way to analyze the performance of any system. Our goal in PMM is to support this method fully over time, and these graphs take us one step forward.

When it comes to utilization, there are many graphs available in PMM. There is the CPU Usage graph: …