Percona announces the release of Percona XtraDB Cluster Operator 0.3.0 early access.

The Percona XtraDB Cluster Operator simplifies the deployment and management of Percona XtraDB Cluster in a Kubernetes or OpenShift environment. It extends the Kubernetes API with a new custom resource for deploying, configuring and managing the application through the whole life cycle.

You can install the Percona XtraDB Cluster Operator on Kubernetes or OpenShift. While the operator does not support all the Percona XtraDB Cluster features in this early access release, instructions on how to install and configure it …

I have written previous blog posts about Oracle Cloud OCI and this series continues. My post titled with Iaas Getting Started was to get us acquainted with important security-focused items like Compartments and network Services like NAT and Internet-Gateways. Then I posted about building MySQL on Compute with Scripting using a mix of OCI Web console navigation… Read More »

I have written previous blog posts about Oracle Cloud OCI and this series continues. My post titled with Iaas Getting Started was to get us acquainted with important security-focused items like Compartments and network Services like NAT and Internet-Gateways. Then I posted about building MySQL on Compute with Scripting using a mix of OCI Web console navigation… Read More »

Distributed systems are hard – I just want to echo that. In MySQL, we have quite a number of options to run highly available systems. However, real fault tolerant systems are difficult to achieve.

Take for example a common use case of multi-DC replication where Orchestrator is responsible for managing the topology, while ProxySQL takes care of the routing/proxying to the correct server, as illustrated below. A rare case you might encounter is that the primary MySQL

node01

on DC1 might have a blip of a couple of seconds. Because Orchestrator uses an adaptive health check – not only the node itself but also consults its replicas – it can react really fast and promote the node in DC2.

Why is this problematic?

The problem occurs when

node01

resolves its temporary issue. A race condition could occur within ProxySQL that could mark it back as read-write. You can increase an …

MySQL 8.0 provides another way to handle JSON documents, actually in a "Not only SQL" (NoSQL) approach... In other words, if you need/want to manage JSON documents (collections) in a non-relational manner, with CRUD (acronym for Create/Read/Update/Delete) operations then you can use MySQL 8.0! Did you know that?

Introduction In this article, we are going to see how a relational database executes SQL statements and prepared statements. SQL statement lifecycle The main database modules responsible for processing a SQL statement are: the Parser, the Optimizer, the Executor. A SQL statement execution looks like in the following diagram. Parser The Parser checks the SQL statement and ensures its validity. The statements are verified both syntactically (the statement keywords must be properly spelled and following the SQL language guidelines) and semantically (the referenced tables and column do exist in the database). During... Read More

The post How does a relational database execute SQL statements and prepared statements appeared first on …

SQL Create Table Statement Example | Create Table in SQL Tutorial is today’s topic. A CREATE TABLE statement is used to create a new table in the database. SQL is the Standard Query Language for manipulating, storing and retrieving data in databases. SQL is used in MySQL, SQL Server, MS Access, Oracle, Sybase, Informix, Postgres, and other database systems. SQL stands for Structured Query Language. SQL lets you access and manipulates databases. RDBMS stands for Relational Database Management System. RDBMS is the basis for SQL, and for all modern database systems such as MS SQL Server, IBM DB2, Oracle, MySQL, and Microsoft Access.

SQL Create Table Statement Example

Working with SQL for data analysis and manipulation sometimes requires creating the new tables. Requirements like, Do you want to store the output of your SQL queries? Do you need to pull the new data sources (for example, csv files) into your data …

MariaDB Server 10.4 came with a whole lot of Security related changes. Some of them are merely optimizations (like MDEV-15649), some improve existing features to be more robust (MDEV-15473, MDEV-7598) or convenient (MDEV-12835, MDEV-16266). Some are MySQL compatibility features, requested by our users (MDEV-7597, MDEV-13095). But the first thing any MariaDB Server user, whether an […]

The post Authentication in MariaDB 10.4 — Understanding the Changes appeared first on MariaDB.org.

For some time, there have been several requests to the MySQL dev team to add dedicated support for an admin to connect to the MySQL server.  We received a contribution from Facebook, bug#90395 ,  to add this functionality, which we then paired with more requirements, implemented in WL#12138 and delivered in MySQL Server 8.0.14.…

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When your application get error "too many connections" underlying problem might be caused by multiple things. For a in-depth understanding of how MySQL handles connections read this blog.

In this blog we will investigate why and how to solve these problems when running MySQL installed on Debian/Ubuntu using systemd (default MySQL packages).

OS: Debian 9
MySQL Server version: 5.7.25 MySQL Community Server (GPL)
(will most likely be the same for MySQL 8.0 versions)

Goal is to have 10.000 working connections to MySQL!

The default value for max_connections is 151 connections so first step is to increase the max_connections variable to 10.000.
This is documented in the manuals here:
- https://dev.mysql.com/doc/refman/5.7/en/too-many-connections.html
- …