Peter Zaitsev of Percona posted a Tweet about an interactive book Select Star SQL which 'aims to be the best place on the internet for learning SQL'.  This interactive book uses a data set that can be downloaded or you could work the queries online.  I showed the website to a neighbor who was asking 'what is the best way to learn SQL'.   The neighbor wanted their own copy of the data and asked how do you turn a raw CSV file into a table.

Well, that can get complicated.
CSV
CSV files use commas to designate each field in the file.  This is a great idea until someone plants a comma in the middle of a field but it is sort of a least common denominator way of passing data between systems.

But a CSV file does not directly fit into a relational table.  You could …

Percona Monitoring and Management (PMM) is a free and open-source platform for managing and monitoring MySQL® and MongoDB® performance. You can run PMM in your own environment for maximum security and reliability. It provides thorough time-based analysis for MySQL® and MongoDB® servers to ensure that your data works as efficiently as possible.



We’ve included a plethora of visual improvements in this release, including:

• PostgreSQL Metrics Collection – Visualize PostgreSQL performance!
• Identify New Queries in Query Analytics
• New Dashboard: Compare System Parameters
• New Dashboard: PERFORMANCE_SCHEMA Wait Events Analysis
• Dashboard Updates – Advanced Data Exploration, MyRocks, TokuDB, InnoDB Metrics …

Codership is pleased to announce the release of Galera Replication library 3.24, implementing wsrep API version 25.  The new release includes improved deadlock error management with foreign keys and security fixes. As always, Galera Cluster is now available as targeted packages and package repositories for a number of Linux distributions, including Ubuntu, Red Hat, Debian, CentOS, OpenSUSE and SLES, as well as FreeBSD. Obtaining packages using a package repository removes the need to download individual files and facilitates the easy deployment and upgrade of Galera Cluster nodes.

This release incorporates all changes up to MySQL 5.7.23, MySQL 5.6.41 and MySQL 5.5.61.

Galera Replication Library 3.24
New features and notable fixes in Galera replication since last binary release by Codership (3.23)

* A support for new …

Do you need to modify the metrics collected from Linux by Percona Monitoring and Management (PMM)? In this blog post we will see how to enable, disable, and update collected metrics on PMM’s linux:metrics exporter. 

We will assume that the PMM client packages are installed, and they are configured already.

Using a custom list of metrics

Let’s now suppose we are not yet collecting any metrics on our desired client server, and we want to enable only the following: diskstats, meminfo, netdev and vmstat. We can use the following …

Please join Percona’s Chief Technology Officer, Vadim Tkachenko, as he presents Running MySQL in Kubernetes on Thursday, September 6th, 2018, at 11:00 AM PDT (UTC-7) / 2:00 PM EDT (UTC-4).

Register Now

Without question, Kubernetes is the most popular container orchestration platform. But can it handle databases? I think so, and in this webinar, I will show you how it does it. This talk presents a quick overview of the persistent storage options (the most critical part of data storage) and then what it takes to run highly available MySQL …

Tweet

A month ago, I wrote a blog on how you can configure the MySQL Shell prompt to suit your needs.  One thing I did not go into details with are the prompt templates prompt_256pl.json and prompt_256pl+aw.json. Common for both of these templates is that they require custom fonts to work.

In the two file names, pl stands for the PowerLine fonts and aw for the Awesome font. These fonts add symbols that are useful to create rich prompts, not only for MySQL Shell, but also for Bash, zsh, vim, etc. The symbols include an angle separator, a lock (that in MySQL Shell is used to symbolize an TLS/SSL connection), and so on.

…

In his excellent blog post, Pavel Trukhanov showed the value of S.M.A.R.T. metric collections, so I wondered how hard would it be to enable their collection in Percona Monitoring and Management (PMM)

A quick search led me to the  text_collector plugin SmartMon, which can be easily integrated with any Prometheus Installation

For PMM, Vadim Yalovets recently showed how to do …

Dear MySQL users,

MySQL Connector/Python 2.1.8 GA is a sixth GA version of 2.1 release
series of the pure Python database driver for MySQL. It can be used for
production environments.

MySQL Connector/Python version 2.1.8 GA is compatible with MySQL Server
versions 5.5 and greater. Python 2.6 and greater as well as Python 3.4
and greater are supported. Python 2.4, 2.5, and 3.1, 3.2, 3.3 are not
supported.

MySQL Connector/Python 2.1.8 is available for download from:

http://dev.mysql.com/downloads/connector/python/#downloads

MySQL Connector/Python 2.1.8 (Commercial) will be available for download
on the My Oracle Support (MOS) website. This release will be available
on eDelivery (OSDC) in next month’s upload cycle.

The ChangeLog file included in the …

In my previous blog post about millions of table in MySQL 8, I was able to create one million tables and test the performance of it. My next challenge is to create 40 million tables in MySQL 8 using shared tablespaces (one tablespace per schema). In this blog post I’m showing how to do it and what challenges we can expect.

Background

Once again – why do we need so many tables in MySQL, what is the use case? The main reason is: customer isolation. With the new focus on security and privacy (take GDPR for example) it is much easier and more beneficial to create a separate schema (or “database” in MySQL terms) for each customer. That creates a new set of challenges that we will need to solve. Here is the summary:

…

Hi,

First of all, thanks very much for sharing this. What I am unclear about and you can hopefully help me with is why are you creating the backup user only on ic2? (SET sql_log_bin = OFF; ..create user.. SET sql_log_bin = ON;).
Would you not want to have that backup user across all the cluster members in the event that ic2 is not the master (auto switch due to ic2 reboot etc)? Also, what is your take on running the mysqlbackup against the router address on the R/W port rather than on a fixed R/W node that could very well not be R/W at any point in the future?

Thanks again and cheers!
Alex

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