The latest from the MySQL community

From time to time, you might notice that your MySQL database suddenly under-performs. To quickly locate the root cause, one might start digging into MySQL slow query logs, trying to locate the query(ies) taking up the server's resources.

Those slow log files contain lots of metrics for each query execution, which can be overwhelming, especially if you have a busy application with lots of queries constantly being executed.

There are several command line tools out there, doing a fantastic job in analyzing those slow log files and summarizing them (examples: pt-query-digest, mysqldumpslow), so if you never used them, you should definitely check them out.

If you're looking for a more visual way to look at those slow logs, another option …

In this post, we will discuss a new feature – the MySQL 8.0.17 clone plugin. Here I will demonstrate how easy it is to use to create the “classic” replication, building the standby replica from scratch.

The clone plugin permits cloning data locally or from a remote MySQL server instance. The cloned data is a physical snapshot of data stored in InnoDB, and this means, for example, that the data can be used to create a standby replica.

Let’s go to the hands-on and see how it works.

Installation & validation process of the MySQL 8.0.17 clone plugin

Installation is very easy and it works in the same as installing other plugins. Below is the command line to install the clone plugin:

master …

The blog post How to Compile Percona Server for MySQL 5.7 in Raspberry Pi 3 by Walter Garcia, inspired me to create an updated install of Percona Server for the Raspberry Pi 3+.

This how-to post covers installing from source and being able to use Percona Server for MySQL in any of your maker projects. I have included everything you need to have a complete Percona Server, ready to store data collection for your weather station, your GPS data, or any other project you can think of that would require data collection in a database.

My years of hands-on support of Percona Server enable me to customize the install a bit. I wanted to build a full Percona …

Last time we used the New MySQL Shell to set up a sandbox instance of InnoDB Cluster in Six Steps. Now to make that cluster function we need to start up MySQL Router to proxy connections. And since we do not show how to do things with Windows, we will configure Router on that Operating System.

Cleaning Up From Last TimeIf you followed the instructions from last time you may find you InnoDB Cluster non functional.  If you have rebooted then you will find that the component pieces of the cluster have not been started.  To clean things up you will have to do the following:

• dba.killSandboxInstance(3310)
• dba.deleteSandboxInstance(3310)
• …

Continuent is pleased to announce that the following new software releases are now available:

• Tungsten Clustering version 5.4.0
• Tungsten Replicator version 5.4.0

Releases 5.4.0 is significant in that it introduces MySQL 8 support, along with many new features, stability improvements and bug fixes.

Highlights common to both products:

Improvements, new features and functionality

• Two new utility scripts have been added to the release to help with setting the Replicator position:
  • tungsten_find_position, which assists with locating information in the THL based on the provided MySQL binary log event position and outputs a dsctl set …

Continuent is pleased to announce that the following new software releases are now available:

• Tungsten Clustering version 6.1.0
• Tungsten Replicator version 6.1.0

Release 6.1.0 is significant in that it introduces MySQL 8 support, along with many new features, stability improvements and bug fixes.

Highlights common to both products:

Improvements, new features and functionality

• Two new utility scripts have been added to the release to help with setting the Replicator position:
  • tungsten_find_position, which assists with locating information in the THL based on the provided MySQL binary log event position and outputs a dsctl set command …

In MySQL 8.0, when using invalid values for date data types, an error is returned. This was not the case in 5.x versions.

Let’s have a look using the table definition of bug 96361:

CREATE TABLE `new_table` (
  `id_table` int(11) NOT NULL AUTO_INCREMENT,
  `text_table` varchar(45) DEFAULT NULL,
  `date_table` date DEFAULT NULL,
  PRIMARY KEY (`id_table`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci

Now we can try the following statement in MySQL 5.7 and MySQL 8.0:

MySQL 5.7.26> SELECT id_table, text_table 
              FROM new_table WHERE date_table = '' OR date_table IS NULL;
Empty set, 1 warning (0.01 sec)

MySQL 5.7.26> show warnings;
+---------+------+-----------------------------------------------------------+
| Level   | Code | Message                                                   | …

Our database tools team is pleased to announce the release of our dbForge MySQL products with a CHECK constraint support. We are looking forward to seeing our customers benefit from it in their everyday work. The fact that MySQL doesn’t support CHECK Constraints syntax caused lots of inconveniences to the developers and DBAs. That deviation […]

This week you can find our MySQL & MySQL Community experts at following shows: 

• Mid-Atlantic Developer Conference, Baltimore, US, August 1-2, 2019

  • Find us at MySQL booth and come to listen David Stokes' sessions as follows:
    • "MySQL & GIS", scheduled for Aug 1 @ 11:30-12:30pm
    • "MySQL without the SQL - Oh My!" scheduled for Aug 2 @ 10:15-11:15 am
• OpenSource Conference Kyoto, Japan, August 2-3, 2019
  • Come to talk to us to our Gold booth in the expo area as well as listen the MySQL talk given by Yuki Yamazaki as:
    • "MySQL Development Trends-Introducing the Latest Information on …

I have not used the new InnoDB clone feature that is now part of MySQL 8.0.17 but wanted to see how it worked.  Setting a sandbox cluster with the new shell is easy and quick.  How easy and quick?
 well, it takes six commands and just a few minutes.

The Steps
1. mysqlsh> dba.deploySandboxInstance(3310)
A new MySQL sandbox instance will be created on this host in
C:\Users\dstokes\MySQL\mysql-sandboxes\3310

Warning: Sandbox instances are only suitable for deploying and
running on your local machine for testing purposes and are not
accessible from external networks.

Please enter a MySQL root password for the new instance: ******
Deploying new MySQL instance...

Instance localhost:3310 successfully deployed and started.
Use shell.connect('root@localhost:3310'); to connect to the instance.
…