Percona announces the release of Percona XtraDB Cluster 5.6.41-28.28 (PXC) on September 18, 2018. Binaries are available from the downloads section or our software repositories.

Percona XtraDB Cluster 5.6.41-28.28 is now the current release, based on the following:

• Percona Server for MySQL 5.6.41
• Codership WSREP API Rrelease 5.6.41
• Codership Galera library 3.24

Fixed Bugs

• …

In this blog post, we review some of the important aspects of configuring and managing SSL in MySQL hosting. These would include the default configuration, disabling SSL, and enabling and enforcing SSL on a MySQL server. Our observations are based on the community version of MySQL 5.7.21.

Default SSL Configuration in MySQL

By default, MySQL server always installs and enables SSL configuration. However, it is not enforced that clients connect using SSL. Clients can choose to connect with or without SSL as the server allows both types of connections. Let’s see how to verify this default behavior of MySQL server.

When SSL is installed and enabled on MySQL server by default, we will typically see the following:

1. Presence of *.pem files in the MySQL data directory. These are the various client and server certificates and keys that are in …

Graphs are important, as they are your window onto your monitored systems. ClusterControl comes with a predefined set of graphs for you to analyze, these are built on top of the metric sampling done by the controller. Those are designed to give you, at first glance, as much information as possible about the state of your database cluster. You might have your own set of metrics you’d like to monitor though. Therefore ClusterControl allows you to customize the graphs available in the cluster overview section and in the Nodes -> DB Performance tab. Multiple metrics can be overlaid on the same graph.

Cluster Overview tab

Let’s take a look at the cluster overview - it shows the most important information aggregated under different tabs.

Cluster Overview Graphs

You can see graphs like “Cluster Load” …

A few months ago I wrote a blog post on How to Capture Per Process Metrics in PMM. Since that time, Nick Cabatoff has made a lot of improvements to Process Exporter and I’ve improved the Grafana Dashboard to match.

I will not go through installation instructions, they are well covered in original blog post.  This post covers features available in release 0.4.0 Here are a few new features you might find of …

If you are a MySQL DBA for a long time (like me), it’s very complicated to get rid of bad habits. One of them I really need to change is the way to retrieve the list of all the running queries (processlist).

Usually, I use SHOW FULL PROCESSLIST which is very convenient, but like querying the Information_Schema, this statement has negative performance consequences because it requires a mutex. Therefore, you should use Performance_Schema which doesn’t require a mutex and has minimal impact on server performance.

Let’s see the output of both commands:

mysql> show full processlist\G                                                                                                                   *************************** 1. row ***************************
     Id: 4
   User: event_scheduler
   Host: localhost
     db: NULL
Command: Daemon
   Time: 376338
  State: …

Recently our team was tasked to implement MySQL 8.0 in production for a client. While MySQL 8.0 is looking very promising and has a lot of cool new features and revamped old features, it’s still pretty young. The MySQL development team is working very hard on stabilizing the product but, reading the latest release notes for version 8.0.12, it is still very much a bugfix release and not something you will want to put in production immediately. Also, given the fact that a lot of tools such as Percona Xtrabackup do not support MySQL 8.0 yet, we were a bit reluctant to proceed with this idea. But … the client had a strong use case to make use of roles and resource groups and we like challenges so we decided to give it a go.

Another use case that was presented is the one where …

This is the first of a two-part series on using the keyring_vault plugin with Percona Server for MySQL 5.7. The second part, Backing up Percona Server for MySQL with keyring_vault plugin enabled, walks through how to use Percona Xtrabackup to backup from this instance and restore to another server and set it up as a slave with keyring_vault plugin.

What is the keyring_vault plugin?

The keyring_vault is a plugin that allows the database to interface with a Hashicorp Vault server to store and secure encryption keys. The Vault server then acts as a centralized encryption key management solution which is critical for security and for compliance with various security standards.

Configuring Vault

Create SSL certificates to be used by Vault. You can use …

MySQL Document Store Building Index Search

This is a tutorial to go through setting Up MySQL 8.0 Document Store, Importing World_x Sample database and building GENERATED COLUMN with Index and lastly to show the QUERY PLAN using collection.find() that uses the INDEX built.

INSTALLATION Pre-requisite
1. MySQL 8.0.11+
2. MySQL Shell 8.0.11+
3. Download  Sample Database "world_x database" from https://dev.mysql.com/doc/index-other.html




MySQL Database Initialization  
Using --initialize-insecure for this tutorial which means it initializes a database with empty password for root@localhost user.
Assuming we have 'mysql', 'mysqld' setup properly.

mysqld --initialize-insecure --datadir=<data directory>


Create my.cnf  (example E:/temp/data1/my.cnf)

…

One of the new JSON functions in MySQL 8.0 is JSON_TABLE. It is also MySQL’s first table function. That is, the return value is not a scalar value, but a result set. JSON_TABLE will convert (part of) a JSON document into a relational table.…

Join Percona Chief Evangelist Colin Charles as he covers happenings, gives pointers and provides musings on the open source database community.

This week wraps up the London MySQL meetup, where there were four presentations, for the intimate yet diverse crowd. We saw representation from Oracle MySQL, MariaDB Corporation, Pythian, and Percona. Long-time organizer Ivan Zoratti has also handed off the baton to Maria Luisa Raviol, and going forward she will ensure meetups are at least once per quarter. It was a real pleasure to see MySQL Community Manager Dave Stokes at the event, too.

A new book to read: AWS System Administration: Best Practices for Sysadmins in the Amazon Cloud. There is coverage of RDS, from the standpoint of an example application stack as …