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Debugging Large Data with Rewriter

A customer showed that a particular client reported a less-than-helpful error message when it tried to display some meta-data about a table.

I couldn’t repeat the behavior with just a copy of the schema, so I suspected it was because of the size of data in the customer’s server – somebody had used an int where they needed a long.

The customer’s data was quite large – many hundreds of GB – more than I could easily whip up on my laptop to test. But, I didn’t really need all that data, or even any data at all; I just needed MySQL to pretend it had all that data. Specifically, I needed information_schema to report a large data_length.

Enter Rewriter, the query rewrite plugin that ships …

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An overview of the Group Replication performance

In this blog post we will present a first look at the performance of Group Replication (GR), now that the RC is out. The goal is to provide some insight on the throughput, latency and scalability one can expect in a modern computing infrastructure, using GR in single- and multi-master configurations, but mostly focused on single-master.…

Auditing MySQL Users With McAfee Plugin

It is a common auditing requirement to log user connection events, including whether or not authentication was successful.
There are a number of alternatives available for MySQL, but unfortunately there is no built-in functionality at the time of this writing. In this post we will discuss auditing MySQL users with McAfee plugin, which is available under GPL Version 2 license.

Installation instructions

These apply to debian-based hosts, but instructions for red hat are similar.

1. Download latest plugin release from github.

At the time of this post for MySQL 5.5 you can get:

wget https://bintray.com/mcafee/mysql-audit-plugin/download_file?file_path=1.0.9-release%2Faudit-plugin-mysql-5.5-1.0.9-585-linux-x86_64.zip

2. Decompress …

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MySQL 8.0 Labs: [Recursive] Common Table Expressions in MySQL (CTEs)

The MySQL development team just published a Labs release of the MySQL Server (available under “MySQL Server 8.0.0 Optimizer”).
A prominent feature of this release, which I developed, is [Recursive] Common Table Expressions, also known as

  • [recursive] CTE,
  • [recursive] subquery factoring,
  • WITH [RECURSIVE] clause.

MySQL Enterprise Monitor 3.3 Is now GA!

We're very happy to announce the general availability of the next release of MySQL Enterprise Monitor, version 3.3 (see the full changelog here). This is the best in class tool for monitoring and management of your MySQL assets, included with your MySQL Enterprise Edition subscription.

What's New?

Backup Dashboard -- The new  …

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Introducing MySQL InnoDB Cluster – A Hands-On Tutorial

Traditionally, setting up high availability (HA) in MySQL has been a challenging task, especially for people without advanced knowledge of MySQL. From understanding concepts and technologies, to the tooling, specific commands and files to execute and edit, there’s a lot of things you need to know even when planning a test deployment (the Quick Start Guide for Group Replication should give you an idea).…

Introducing MySQL InnoDB Cluster – Demo Video

Today we are introducing a new MySQL feature called MySQL InnoDB Cluster. Make sure to watch the demo video on the MySQL YouTube Channel!

Find out more by looking into the MySQL InnoDB Cluster documentation.

If you got questions or feedback please feel free to post on the MySQL Forums.…

Introducing MySQL InnoDB Cluster – MySQL HA: Out-of-Box, Easy to use High Availability

Introducing the new MySQL InnoDB Cluster Feature

MySQL has had good support for replication for a long time. After all, it is one of the key features that have enabled companies like Facebook, Booking, Twitter and so many others to grow and scale to such extreme scale with MySQL as their primary database engine.…

Mysql Master-Master Replication setup on Docker

Ever wondered why Docker is so much popular. Here it is why?  Docker has made it so much easier to spin up nodes as required and then map them all in quick easy way .

In this tutorial I am going to setup a Master-Master Replication between 2 Mysql Nodes , and of course both of them running on Docker based on Ubuntu 16 LTS.

Requirements: –

  • docker setup . Refer to Docker article for installing docker
  • docker pull mysql:latest from docker hub repo .

Lets crack on

Step 1  – Prepare the configurations / data folders 

Best thing of this docker mysql image is that you can setup your own Data, Log, config, passwords …

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The #1 Open Source Database Now Available in Oracle Cloud

We're very excited to announce the General Availability of Oracle MySQL Cloud Service!

Oracle MySQL Cloud Service allows you to accelerate innovation and to rapidly, securely and cost-effectively develop & deploy modern applications powered by the world’s most popular open source database.

Built on the proven MySQL Enterprise Edition and powered by the Oracle Cloud, it provides a simple, automated, integrated and enterprise-ready cloud service that enables organizations to deliver MySQL-based applications globally at scale.

Check out the Oracle MySQL Cloud Service video for a rapid …

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