Very often, database performance is affected by the inability to cache all the required data in memory. Disk IO, even when using the fastest devices, takes much more time than a memory access. With MySQL/InnoDB, the main memory cache is the InnoDB buffer pool. There are many strategies we can try to fit as much data as possible in the buffer pool, and one of them is data compression.

With regular MySQL, to compress InnoDB data you can either use “Barracuda page compression” or “transparent page compression with punch holes”. The use of the ZFS filesystem is another possibility, but it is external to MySQL and doesn’t help with caching. All these solutions are transparent, but often they also have performance and management implications. If you are using Percona Server for MySQL, you have yet another option, “column …

If the first time you heard this phrase “parent-child relationship in MySQL”, you went “Ok, anyone else got cool made up names or are we to start brainstorming now”, then this article is for you. For the uninitiated, this might not make much sense. That’s perfectly fine because you do not necessarily need it everyday.

Parent-child relationship in MySQL has to deal with establishing some hierarchal dependencies between records in a database table. In MySQL terms, it means say that “row 12 is the parent of row 14” and stuff like that. In business terms, it will mean establishing a dependency relationship between two similar entities. For example, keeping a record of all the people in a village and matching parents to their children.

So, whenever you hear that phrase, think about a real-world parent-child relationship. For the rest of this article, we are going to explore how to establish said relationships and possible …

MySQL 8.0.13 improves replication lag monitoring by extending the instrumentation for transaction transient errors. These temporary errors, which include lock timeouts caused by client transactions executing concurrently as the slave is replicating, do not stop the applier thread: instead, they cause a transaction to retry.…

Tweet

First of all, thanks to everyone who attended my sessions at the recent Oracle OpenWorld and Code One in San Francisco. It was a great privilege to be allowed to make a number of presentations.

All of the workbooks and scripts from the hands-on labs (HOL) and the slides from the talks have been made available at OpenWorld’s and Code One’s session catalogues. You can download the files by using the OpenWorld catalog searching for my name or the session number (see below). Click on the download icon for each of the presentations you are interested in.

…

Tweet

I have already blogged a couple of times about the MySQL Shell prompt. In the first blog, I wrote about how in general to configure it, and in the second blog, I showed how to install the necessary fonts to use the prompt with the Awesome and Powerline fonts.

In this blog, I will show a new feature of MySQL Shell 8.0.13 which adds support to have a line break in the prompt and still get multi line statements align correctly. I will first discuss why you may want to use the new feature, then go through the new templates using this feature, and …

Percona released a Release Candidate (RC) version of Percona Server for MySQL 8.0, the company’s free, enhanced, drop-in replacement for MySQL Community Edition. Percona Server for MySQL 8.0 includes all the features of MySQL Community Edition 8.0, along with enterprise-class features from Percona that make it ideal for enterprise production environments. The latest release offers increased reliability, performance and security.

Percona Server for MySQL 8.0 General Availability (GA) will be available later this year. You learn how to install the release candidate software here. Please …

Percona is glad to announce the release candidate of Percona XtraBackup 8.0-3-rc1 on October 31 2018. You can download it from our download site and apt and yum repositories.

This is a Release Candidate quality release and it is not intended for
production. If you want a high quality, Generally Available release, use the current stable version (the most recent …

Following the alpha release announced earlier, Percona announces the release candidate of Percona Server for MySQL 8.0.12-2rc1 on October 31, 2018. Download the latest version from the Percona website or from the Percona Software Repositories.

This release is based on MySQL 8.0.12 and includes all the bug fixes in it. It is a Release Candidate quality release and it is not intended for production. If you want a high quality, Generally Available release, use the current Stable version (the most recent stable release at the time of writing in the 5.7 series is 5.7.23-23).

Percona provides completely open-source and free software.

Installation

As this is a release candidate, installation is performed by enabling the testing repository and installing the software via …

Fedora 29 was released earlier today, and we congratulate the Fedora community on the latest iteration of many people’s favourite Linux distro. Following our tradition of rapidly adding support for new Linux distro versions, we have added the following MySQL products to our official MySQL yum repos: MySQL Server (8.0.13 and 5.7.24) Connector C++ 8.0.13 Connector […]

Cluster management, a common software infrastructure among technology companies, aggregates compute resources from a collection of physical hosts into a shared resource pool, amplifying compute power and allowing for the flexible use of data center hardware. At Uber, cluster management …

The post Peloton: Uber’s Unified Resource Scheduler for Diverse Cluster Workloads appeared first on Uber Engineering Blog.