In initial Group Replication release,  5.7.17, we included the Single-Primary Mode with automatic membership and fail-over features. The MySQL Server 8.0.2 release has brought further enhancement to Group Replication Single-Primary Mode that will allow users to influence primary member election using integer member weight value.…

Recently, we have implemented a set of new commands in ProxySQL Tools to manage MySQL users. You can create, delete, and modify users from command line. There are commands:

proxysql-tools galera user list
proxysql-tools galera user create username [—-options]
proxysql-tools galera user delete username 
proxysql-tools galera user modify username [—-options]
proxysql-tools galera user set_password username

You can set a user’s password can be set at time of creation with —-password option or later on with  set_password sub-command.

Create user

Let’s add MySQL user to ProxySQL Tools with the next params:

Username: mysql_user
Password: mysql_user_password
Active: True
Use SSL: True
Default hostgroup: 10
Default schema: information_schema
Schema locked: True
Transaction persistent: True
Fast …

Recently, my friend Marco Tusa(MySQL Daddy or the Grinch) wrote his first impression on MySQL Group Replication (part of InnoDB Cluster). And his conclusion was not that positive. But when I analyze his setup, I understand that his assumptions were not so right.

Let's try to explain what were the issues and why his test wasn't correct.

Before commenting Marco's tests, I would like to clarify the flow-control implementation in Group Replication:

We designed the flow-control feature in Group Replication as a safety measure for delaying writer nodes when they consistently exceed the write capacity of the Group, so that a large backlog would not make it hard to switch over from a member to another.

Flow-control is …

Join Percona’s, Architect, Manjot Singh as he presents Database Backup and Recovery Best Practices (with a Focus on MySQL) on Thursday, July 27, 2017 at 11:00 am PDT / 2:00 pm EDT (UTC-7).

Register Now

In the case of a failure, do you know how long it will take to restore your database? Do you know how old the backup will be? In this presentation, we will cover the basics of best practices for backup, restoration and business continuity. Don’t put your company on the line due to bad data retention and backup policies.

…

Embedding Structured Query Language (SQL) within PHP, or other programming languages, has been problematic for some. Mixing two programming languages together is just plainly not aesthetically pleasing. Especially when you have a declarative language (SQL) mixed with a procedural-object oriented language. But now, with the MySQL XDevAPI PECL extension, PHP developers can now stop mixing the two languages together together. MySQL Document StoreThe MySQL Document Store eliminates the heavy burden for SQL skills. It is designed to be a high speed, schema-less data store and is based on the MySQL JSON data type. This gives you roughly a gigabyte of store in a document format to do with as needed. So you do not need to architect you data before hand when you have no idea how it will evolve. No need to normalize your data. Now behind the scenes …

When you need to work with a database that you are not 100% familiar with, you can be overwhelmed by the hundreds of metrics available. Which ones are the most important? What should I monitor, and why? What patterns in metrics should ring some alarm bells? In this blog post we will try to introduce you to some of the most important metrics to keep an eye on while running MySQL or MariaDB in production.

Com_* status counters

We will start with Com_* counters - those define the number and types of queries that MySQL executes. We are talking here about query types like SELECT, INSERT, UPDATE and many more. It is quite important to keep an eye on those as sudden spikes or unexpected drops may suggest something went wrong in the system.

Our all-inclusive database management system ClusterControl shows you this data related to the most common query types in the “Overview” section.

Handler_* status counters

Percona announces the GA release of Percona XtraBackup 2.4.8 on July 24, 2017. You can download it from our download site and apt and yum repositories.

Percona XtraBackup enables MySQL backups without blocking user queries, making it ideal for companies with large data sets and mission-critical applications that cannot tolerate long periods of downtime. Offered free as an open source solution, Percona …

Dear MySQL Users,

A new GA (general availability) version of MySQL Connector/C has been
made available: MySQL Connector/C 6.1.11 GA. The MySQL Connector/C 6.1
implements the MySQL C API for connecting client applications to the
MySQL Server 5.5 or newer.

You can download the production release at:
http://dev.mysql.com/downloads/connector/c/6.1.html

MySQL Connector C (Commercial) will be available for download on the My
Oracle Support (MOS) website. This release will be available on
eDelivery (OSDC) in next month’s upload cycle.

Please see the documentation and the README file in the source distribution
for a detailed description of bugs that have been fixed.

Enjoy!

=======================================================================

Changes in MySQL Connector/C 6.1.11 (2017-07-24)

Security Notes

* The linked …

MySQL Connector/ODBC 5.3.9, a new version of the ODBC driver for
the MySQL database management system, has been released.

The available downloads include both a Unicode driver and an ANSI
driver based on the same modern codebase. Please select the driver type
you need based on the type of your application – Unicode or ANSI.
Server-side prepared statements are enabled by default. It is suitable
for use with any MySQL version from 5.5.

This is the fourth release of the MySQL ODBC driver conforming to the
ODBC 3.8 specification. It contains implementations of key 3.8 features,
including self-identification as a ODBC 3.8 driver, streaming of output
parameters (supported for binary types only), and support of the
SQL_ATTR_RESET_CONNECTION connection attribute (for the Unicode driver
only).

Also, Connector/ODBC 5.3 introduces a GTK+-based setup …

In recent months, there had been some really exciting news from the MySQL team:

• (Recursive) Common Table Expressions in MySQL
• Introducing Window Functions

These two SQL standard language features are among the most powerful SQL features that are available from most other databases. I frequently include them in conference talks about SQL (see my article about 10 SQL Tricks That You Didn’t Think Were Possible), and as well in the Data Geekery SQL Masterclass. With MySQL 8.0 now supporting these …