The latest from the MySQL community

     A few weeks ago the MySQL Group on Linked.in passed 20,000 members. For those of you who do not know about Linked.in, it is a business and employment oriented online platform that is mainly used for professional networking, and allows job seekers to post their resumes and employers to post jobs.

    You can find job positing, announcements, relevant blog posts, and more on the MySQL page. Please join us if you already have an account.

All opinions expressed in this blog are those of Dave Stokes who is actually amazed to find anyone else agreeing with him

In my previous post Back From a Long Sleep, MyDumper Lives!, I told you that Fast Index Creation was in the queue and (after fixing several bugs) it will package in release 0.10.7 next month. But why am I so excited about it? Well, this feature opens new opportunities, what I’m going to call Restore Strategies.

In the Past…

In the past, the only option was to first restore the table definition and then insert the data rows in two simple steps. On tables with millions of rows, we already know why it takes more time as it inserts in the clustered index and in the secondary index, instead of building the secondary indexes after the data has been inserted, as myloader is able to do now. 

Nowadays, we have the option to do it, in …

We are proud to announce the latest release of ProxySQL version 2.2.0

ProxySQL is a high performance, high availability, protocol aware proxy for MySQL, with a GPL license! It can be downloaded from the ProxySQL Repository (instructions here) or for a Docker image check out the Official ProxySQL Docker Repository. ProxySQL is freely usable and accessible according to the GNU GPL v3.0 license.

Release Overview Highlights

ProxySQL v2.2.0 is a minor release comprising of backward compatible changes, enhancements and bug fixes. Going forward ProxySQL will be using the common versioning standard “Major.Minor.Patch” and so this is essentially the first minor release of the 2.1 branch and inclues many fixes and features that were added to the 2.0 branches …

In this blog, we will discuss about how to scale out MySQL NDB Cluster in few easy steps. The use cases could be, when user business applications demand massive expansion and the existing cluster may not able to handle the request in that case a cluster scaling is needed. This is an online procedure i.e. zero cluster downtime so that user’s business won’t affect while this scaling process is going on.

In the below demo, we will see, how to scale from a 4 nodes cluster to 8 nodes cluster while transactions are going on.

Let’s create a MySQL NDB Cluster with the following environment.

• MySQL NDB Cluster version (Latest GA version)
• 1 Management node
• 4 Data nodes
• 1 MySQLDs
• Configuration slots for up to 4 additional API nodes

Step 1: Let's start the Cluster

Let’s start a 4 nodes cluster.
…

Time zone handling can sometimes generate confusion, especially when dealing with data migrations to different host running on a different time zone, or when switching to a Daylight Saving Time (DST) time zone or when leap seconds are introduced. Will the stored date still make sense after changing a system-wide configuration? What happens when you migrate a server to another host? What is actually stored in the database?

There’s plenty of literature around about MySQL and time zone management, but there’s also missing information, because new features and fixes are constantly introduced into MySQL Server in this area. So I thought that spending a few words here to summarize how to best deal with time zones, and keeping this information up to date to reflect the current implementation …

 The Dutch PHP Conference is June 17th and 18th and I am lucky enough to be presenting again this years.  This is an amazing event to attend but this year it is virtual. At 10:00 to 13:00 CEST on the 17th I will be presenting on MySQL 8.0 Indexes, Histograms, and Other Ways to Speed Up Your Queries.  This talk starts with assuming you are new to adding indexes or histograms, do not know how to find your query plan, and have not been introduced to ways of speeding up your database queries.  Now if you have some knowledge in this area, this session will help you build on what you know already. 

Now if you want to learn more on indexes and histograms you can attend this conference too!  And this conference is FREE!  However for workshops, like my session, there are a limited number of virtual seats and you need to …

The combination of the information obtained from the “pt-summaries” discussed in the previous posts of this series (Part 1: The Percona Support Way, Part 2: Knowing the Server, Part 3: What MySQL?) helps us come up with the first impression of a MySQL server. However, apart from the quick glance we get at two samples of a selective group of MySQL status variables, they provide what I call a “static” view of the server, akin to looking at a still picture of an engine. We get the chance to spot some major discrepancies in the MySQL configuration in view of the available resources in the …

Although the main interface between applications and a Vitess database is through the MySQL protocol, Vitess is a large and complex distributed system, and all the communication between the different services in a Vitess cluster is performed through GRPC. Because of this, all service boundaries and messages between Vitess' systems are specified using Protocol Buffers. The history of Vitess' integration with Protocol Buffers is rather involved: We have been using and keeping up to date with the Go Protocol Buffers package since its earliest releases, up until May last year, when Google released a new Go API for Protocol Buffers, which is not backwards compatible with the previous Go package.

In the previous post of this series, we looked at the hardware specifications and operating system settings of the host server through the lenses of a pt-summary report. Now that we know the foundation on which the database is running, we can turn our focus to MySQL itself. The second of our triad of tools from the Percona Toolkit will help us with that:

pt-mysql-summary conveniently summarizes the status and configuration of a MySQL database server so that you can learn about it at a glance. 

The goal for this part is to find what MySQL distribution and version is being used if the server …

Percona live is over, and we finally get some feedback about our presentations.

Initially I had 3 presentations to give:

• Comparing High Available Solutions With Percona XtraDB Cluster and Percona Server With Group Replication.
• Comparing Hash Join solution, the good, the bad and the worse. The New version 2021.
• Boosting MySQL NDB cluster & MySQL Innodb Cluster with PrxySQL V2

But when I saw we were having a lot of great submissions, I decided that it would be better for the conference and for Percona to drop 2 of them and leave some free slots for others.

That has always been my line of conduct, I do not think we should have speakers with multiple talks unless exceptions.  I know in the past I had been presenting multiple times, but that is why I am stating this now, more and more.

Anyhow, the remaining talk was Comparing High Available Solutions With Percona …