In the “State of the Open-Source DBMS Market, 2018”, Gartner predicts that by 2022, 70 percent of new in-house applications will be developed on an open-source database. And 50% of existing commercial databases will have converted. So, Oracle DBAs, get ready to start deploying and managing new open source databases - along with your legacy Oracle instances. Unless you’re already doing it.

So how does MySQL or MariaDB replication stack up against Oracle Data Guard? In this blog, we’ll compare the two …

MySQL Enterprise Monitor is the best way to monitor MySQL databases from a single to multiple instances on your network or in the cloud. Period. This, to me at least, is the core tool that comes with an Enterprise Subscription. You can use it to monitor the free Community Edition of the MySQL Server but you do need to purchase the subscription.

MEM monitors of MySQL instances (and their hosts), gives notification of potential issues or problems, and it will also provide advice on how to correct issues.

The MySQL Enterprise Monitor Agent monitors the MySQL server, including checking the server accessibility, configuration, obtains the server ID, and the environment to enable collecting more detailed information. In addition to the information accessible by accessing variable and configuration information within the server, other configuration parameters, such as the replication topology, are also collected from the …

The MariaDB Foundation is pleased to announce the availability of MariaDB 10.4.1, the first beta release in the MariaDB 10.4 series, as well as MariaDB Connector/Node.js 2.0.2, the first release candidate of the 100% JavaScript non-blocking MariaDB client for Node.js. See the release notes and changelogs for details. Download MariaDB 10.4.1 Release Notes Changelog What […]

The post MariaDB 10.4.1 and MariaDB Connector/Node.js 2.0.2 now available appeared first on MariaDB.org.

Let’s look at some of the most popular Percona Database Performance Blog posts in 2018.

The closing of a year lends itself to looking back. And making lists. With the Percona Database Performance Blog, Percona staff and leadership work hard to provide the open source community with insights, technical support, predictions and metrics around multiple open source database software technologies. We’ve had nearly 4 million visits to the blog in 2018: thank you! We look forward to providing you with even better articles, news and information in 2019.

As 2018 moves into 2019, let’s take a quick look back at some of the most popular posts on the blog this year.

Top 10 Most Read

These posts had the most number of views (working down from the highest):

Percona announces the release of Percona Server for MySQL 5.7.24-27 on December 19, 2018 (downloads are available here and from the Percona Software Repositories). This release merges changes of MySQL 5.7.24, including all the bug fixes in it. Percona Server for MySQL 5.7.24-27 is now the current GA release in the 5.7 series. All of Percona’s software is open-source and free.

If you’re currently using Percona Server for MySQL 5.7, Percona recommends upgrading to this version of 5.7 prior to upgrading to Percona Server for …

In the comments section of one of our blogs a reader asked about the impact of wsrep_slave_threads on Galera Cluster’s I/O performance and scalability. At that time, we couldn’t easily answer that question and back it up with more data, but finally we managed to set up the environment and run some tests.

Our reader pointed towards benchmarks that showed that increasing wsrep_slave_threads did not have any impact on the performance of the Galera cluster.

To explain what the impact of that setting is, we set up a small cluster of three nodes (m5d.xlarge). This allowed us to utilize directly attached nvme SSD for the MySQL data directory. By doing this, we minimized the chance of storage becoming the …

MySQL 8.0 and the Document Store highlight brand new client tools such as the Shell and Connector/Node.js, both providing a JavaScript implementation of the X DevAPI. Although, for most cases, the public interface tends to be similar on both (barring some small details), there is one notable exception.

The way you handle result sets in a Node.js app using Connector/Node.js is a bit different from the way you do it using an interactive session or a non-interactive JS script in the Shell.

Executing an operation in the MySQL server …

Codership is pleased to announce the release of Galera Replication library 3.25, implementing wsrep API version 25. The new release includes many bug fixes and fixes to all security issues mentioned in the Oracle Critical Patch Update Advisory – October 2018

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 5.7.24, MySQL 5.6.42 and MySQL 5.5.62.

Galera Replication …

The pthreads reader writer locks have a couple of problems that can lead to application hangs. The trylock functions can cause other threads to hang indefinitely in the rdlock or wrlock functions even after the lock is no longer held.  If these hanging threads hold other locks, the application can deadlock and grind to a halt.  This bug was reported in glibc bug 23844 and has existed since glibc …

When I attended AWS Re:Invent 2018, I saw there was a lot of attention from both customers and the AWS team on Amazon RDS Aurora Serverless. So I decided to take a deeper look at this technology, and write a series of blog posts on this topic.

In this first post of the series, you will learn about Amazon Aurora Serverless basics and use cases. In later posts, I will share benchmark results and in depth realization results.

What Amazon Aurora Serverless Is

A great source of information on this topic is How Amazon Aurora Serverless Works from the official AWS  documentation. In this article, you learn what Serverless deployment rather than provisional deployment means. Instead of specifying an instance …