We recently released the presentations for ConFoo Montreal. This giant conference will be held on March 8-10, 2017.

It’s also the last chance to get tickets for ConFoo Vancouver, held on December 5-7, 2016.

ConFoo is a multi-technology conference aimed specifically at web developers. It has between 100 and more than 150 presentations by local and international speakers. This conference offers a great diversity in content to expand your knowledge and increase your productivity. It is the perfect place to sharpen those hard tech and start using these tools for your company skills and discover the latest practices .

There is a great range of   …

This blog discusses some important aspects of GCache.

Why do we need GCache?

Percona XtraDB Cluster is a multi-master topology, where a transaction executed on one node is replicated on another node(s) of the cluster. This transaction is then copied over from the group channel to Galera-Cache followed by apply action.

The cache can be discarded immediately once the transaction is applied, but retaining it can help promote a node as a DONOR node serving write-sets for a newly booted node.

So in short, GCache acts as a temporary storage for replicated transactions.

How is GCache managed?

Naturally, the first choice to cache these write-sets is to use memory allocated pool, which is governed by gcache.mem_store. However, this is deprecated and buggy and shouldn’t be used.

Next …

We are glad to announce the release of the updated versions of:

This blog post reviews the appropriateness of Docker and other container solutions for your database environment.

A few weeks back, I wrote a fairly high-level blog post about containers. It covered what you should consider when thinking about using Docker, rkt, LXC, etc. I hope you’ve taken the chance to give it a quick read. It’s a good way to understand some of the disciplines you need to consider before moving to a new technology. However, it sparked a conversation in our Solutions Engineering team. Hopefully, the same one that you’re having in your organization: should customers run their database in containers? …

Very often MySQL is much less stable than we realize. In this video I explain how to detect and dianose these MySQL stalls that last for 5-10 seconds or more.

The reason nobody knows about these issues is that they’re:
a) rare
b) intermittent
c) monitoring software can’t catch them

You can use pt-stalk to detect and diagnose such issues. All of the tools I have mentioned in this video are part of Percona Toolkit (no wonder they all start with PT), you can find the toolkit here:

Percona Toolkit

Here’s the main commands I have discussed in this video:

Starting pt-stalk in foreground

# pt-stalk

Starting pt-stalk in background with email notification:

# pt-stalk …

This release fixes a few issues in the new GUI transactions supporting with specific and uncommon server settings.

Changes as compared to SQLyog MySQL GUI 12.3.1 include:

Bug Fixes:

* If an INIT_CONNECT setting in server configuration specified SET AUTOCOMMIT = 0 and global AUTOCOMMIT was 1 (or non-existent as in MySQL 4.1 and 5.0), the ‘transactions’ menu in SQLyog would incorrectly display AUTOCOMMIT as 1 after connection.
* Same code change as above also fixes a crash that could occur with 4.1 servers.
* Transactions support would fail to initialize with servers running global ANSI mode. SQLyog will not work in ANSI mode but connection and initialization should work, so that user as the first step may specify a supported session sql_mode (from the editor or from ‘advanced’ tab in connection …

Join Percona’s Percona XtraDB Cluster Lead Software Engineer Krunal Bauskar for a webinar on Thursday, November 17, 2016, at 7:30 am PST on MySQL High Availability with Percona XtraDB Cluster 5.7.

Percona XtraDB Cluster 5.7 is our brand new MySQL 5.7 compatible Galera-based high availability (HA) solution. Whether you’re new to MySQL clustering technology, or experienced with Galera-based replication, this tutorial provides great insights into working with the software, …

NinesControl is a new service from Severalnines which helps you deploy MySQL Galera and MongoDB clusters in the cloud. In this blog post we will show you how you can easily deploy and monitor your databases on AWS and DigitalOcean.

Deployment

At the moment of writing, NinesControl supports two cloud providers - Amazon Web Services and DigitalOcean. Before you attempt to deploy, you need first to configure access credentials to the cloud you’d like to run on. We covered this topic in a blog post.

Once it’s done, you should see in the “Cloud Accounts” tab the credentials defined for the chosen cloud provider.

You’ll see screen below as you do not have any clusters running yet:

You can click on “Deploy your first cluster” to start your first deployment. You will be presented with a screen …

Using Vault with MySQL

In my previous post I discussed using GPG to secure your database credentials. This relies on a local copy of your MySQL client config, but what if you want to keep the credentials stored safely along with other super secret information? Sure, GPG could still be used, but there must be an easier way to do this.

This post will look at a way to use Vault to store your credentials in a central location and use them to access your database. For those of you that have not yet come across Vault, it is a great way to manage your secrets – securing, storing and tightly controlling access. It has the added benefits of being able to handle leasing, key revocation, key rolling and auditing.

During this blog post we’ll accomplish the following …

This blog post looks at MongoDB and MySQL, and covers high-level MongoDB strengths, weaknesses, features, and uses from the perspective of an SQL user.

Delving into NoSQL coming from an exclusively SQL background can seem like a daunting task. I have worked with SQL in both small MySQL environments and large Oracle SQL environments. 

When is it a good choice?

MongoDB is an incredibly robust, scalable, and operator-friendly database solution. MongoDB is a good choice when your developers will also be responsible for the database environment. In small shops and startups, this might be the case. MongoDB stores information in BSON (binary JSON). BSON is the native JSON (JavaScript Object Notation) language used by MongoDB to retrieve information stored in BSON on the back end. JSON is easily relatable to other programming languages, and many developers will already have experience with it.

…