Severalnines Blog
The automation and management blog for open source databases

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How to Benchmark Performance of MySQL & MariaDB using SysBench

How can you quickly evaluate performance of a database under intensive load? Welcome to sysbench. This blog gives you a good background of sysbench, and how you can use it to benchmark MySQL and MariaDB.

How to Recover Galera Cluster or MySQL Replication from Split Brain Syndrome

Split brain syndrome is a state where a cluster of nodes is partitioned into smaller clusters of equal numbers of nodes, and each cluster believes it is the active cluster. This is a harmful state, as data is changed on a partition, without being replicated to the other. This blog post describes how to prevent a split brain from happening, and what can be done if it does happen.

Why is PostgreSQL Running Slow? Tips & Tricks to Get to the Source

This blog provides tips and tricks for identifying issues in your PostgreSQL setup and how to tune it to drive performance.

PostgreSQL Streaming Replication - a Deep Dive

In this blog, we are going to review a little bit of the history of PostgreSQL built-in replication features, and deep dive into how streaming replication works.

Understanding Deadlocks in MySQL & PostgreSQL

Anyone who has written applications on top of MySQL or PostgreSQL probably has had to deal with concurrency problems at some point. This blog focuses on issues around database deadlock, a situation in which two or more transactions are waiting for one another to give up locks.

A Guide to PGpool Part Three - Hints & Observations

Pgpool is a useful piece of software for connection pooling and load balancing. This is part three of the blog, which provides additional hints & observations by its author Vladimir Svedov to round up this topic.

A Guide to Pgpool for PostgreSQL - Part Two

Pgpool is a useful piece of software for connection pooling and load balancing. This is part two of the blog which provides information on failover and recovery.

An Overview of Database Indexing for MongoDB

This blog provides an overview of MongoDB NoSQL Database Indexing, how to create them and measure performance.

A Guide to Pgpool for PostgreSQL - Part One

Pgpool is a useful piece of software for connection pooling and load balancing. This is part one of the blog which provides an overview and tips on how to get up and running with pgpool.

How to Make Your MySQL or MariaDB Database Highly Available on AWS and Google Cloud

Cloud environments are popular these days, and they come with a variety of tools to increase availability. In this blog post, we will show you how leverage these to build a highly available MySQL or MariaDB database. This blog post makes use of Amazon Web Services and Google Cloud Platform.