MySQL NDB Cluster 8.0.20 new features 

This post is about changes in the implementation of NDB Cluster from MySQL NDB Cluster 8.0 through 8.0.20, as compared to earlier release series. We have included only those of MySQL NDB Cluster 8.0.20 new features which are really interesting and can directly influence / make an impact to performance, scalability and reliability:

• MySQL NDB Cluster  development is in parallel with the development of  MySQL Server going forward. What does that mean for MySQL customers globally NDB 8.0 is developed in, built from, and released with the MySQL 8.0 source code tree and numbering scheme for NDB Cluster 8.0 releases follows the scheme for MySQL 8.0 ( starting with version 8.0.13).
• As of NDB 8.0.18, The identifiers can use up to 64 bytes for databases and tables (the 63-byte limit on identifiers is removed ).
• Generated names for foreign keys …

In one of the latest post, I discussed how to transform a large MySQL table to JSON using Apache Spark. Well, that approach works for any tables with any volume. But it’s an overkill for simple and small tables. The good news is MySQL by default has a feature for …

The post Export MySQL query results as JSON appeared first on Geeky Hacker.

The new MySQL-8.0.20 release is coming with re-designed InnoDB Double Write Buffer (DBLWR), and, indeed, it's one huge historical PITA less.. -- why it was so painful and cost us much blood in the past, I could not better explain than already done it in the following article yet from 2018 about MySQL on IO-bound workloads.. The story is not complete, as it's missing the 2019's chapter (will tell it later, np) -- but if you'll (re)read the mentioned above article first, you'll better understand the next ;-))

But at least the current post is only about good news now -- the new DBLWR and how it helps to solve historical MySQL performance problems ! -- and as one picture is better than million words, I'll try to save 3M words here (as there are 3 pictures in this article ;-))

Well, I'll also skip all new design details …

In this post, we introduce a configuration option that controls whether replication channels allow the creation of tables without primary keys. This continues our recent work on replication security, where we allowed users to enforce privilege checks, and/or enforce row-based events.…

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Peter Zaitsev, Founder and CEO at Percona, presents a webinar focused on dealing with an unexpected high traffic event as it is happening. He’ll address the impact a traffic spike can have on your database – from poor query response time to replication lag issues – and provide actionable tips and tricks. Join us and learn how to bring your database under control, earn performance gains, and delight your customers!

Please join Peter Zaitsev, CEO of Percona, on Wednesday, May 13 at 12 pm EDT for his webinar “18 Things To Do When You Have a MySQL Bottleneck“.

Register Now

If you can’t attend, sign up anyway and we’ll send you the slides and recording afterward.

Dear MySQL Users,

MySQL Connector/J 5.1.49, a maintenance release of the production 5.1
branch, has been released. Connector/J is the Type-IV pure-Java JDBC
driver for MySQL.

MySQL Connector/J is available in source and binary form from the
Connector/J download pages at
http://dev.mysql.com/downloads/connector/j/5.1.html
and mirror sites as well as Maven repositories.

MySQL Connector/J (Commercial) is available for download on the My Oracle
Support (MOS) website. This release will shortly be available on
eDelivery (OSDC).

As always, we recommend that you check the “CHANGES” file in the
download archive to be aware of changes in behavior that might affect
your application.

MySQL Connector/J 5.1.49 includes the following …

April 29, 2020 – Percona is pleased to announce the release of Percona XtraDB Cluster 8.0. This release, based on Percona Server for MySQL 8.0 and Galera 4, brings together the best features of these and other products to deliver an open-source high availability MySQL solution that helps enterprises minimize unexpected downtime and data loss, improve data security, and ensure data integrity of your database environments supporting your critical business applications in the most demanding public, private, and hybrid cloud environments.

Percona XtraDB Cluster 8.0 enables enterprises to improve data security and ensure data integrity with new encryption and streaming replication features. …

Writing MySQL Proxy in GO for self-learning: Part 2 — decoding handshake packet

After we built a generic TCP proxy, we can continue with our journey. Today’s goal will be to understand the MySQL Protocol, receive, decode, encode and send to the client the first packet sent by the MySQL Server.

MySQL connections threads

Each client connection to MySQL Server handled by a thread. MySQL is portable, so the underhood threads implementation is system dependent (Windows, macOS, and Linux have their own threads implementation).

What important to us, it’s to understand that a single client connection …

We have just released MySQL 8.0.20. And it has some interesting replication enhancements. In particular one big and exciting feature: binary log compression. Here is the list of things in this release:

• Binary Log Compression (WL#3549). This work done by Luís Soares implements binary log compression, making use of the popular compression algorithm ZSTD.

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To celebrate the publishing of my new book MySQL 8 Query Performance Tuning, the Apress team invited me (thanks Jonathan and Liz) to write a post for the Apress blog. I decided to write about my top six best practices:

• Be wary of best practices
• Monitor
• Work methodically
• Consider the full stack
• Make small, incremental changes
• Understand the change

Yes, my first best practice is to be wary of best practices. Read why I added that and the other best practices at MySQL Performance Tuning Best Practices.

The post Apress Blog: …