Severalnines Blog
The automation and management blog for open source databases

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14 blog posts in 13 categories

Custom Graphs to Monitor your MySQL, MariaDB, MongoDB and PostgreSQL Systems - ClusterControl Tips & Tricks

This blog post will show you how to add custom graphs to ClusterControl to monitor specific MySQL, MariaDB, MongoDB or PostgreSQL metrics.

How to Deploy PostgreSQL for High Availability

In this blog, we will review some important concepts of High Availability, possible database HA architectures and useful components when implementing PostgreSQL HA. Then we will see how to use ClusterControl to deploy an entire high availability stack for PostgreSQL.

How to Monitor PostgreSQL using Nagios

Regardless of database technology, it is necessary to have a monitoring setup, to detect problems so we can take action, or simply to know the current state of our systems. In this blog, we’ll take a look at one of the most widely used monitoring tool: Nagios.

Performance Monitoring & Auditing PostgreSQL - Top Resources

This blog provides a collection of the top resources from Severalnines about monitoring & auditing your PostgreSQL database environments.

Failover for PostgreSQL Replication 101

Failover is a procedure that we hope we won’t have to use, but we must know how it works. In this blog, we will be cover the basic definitions of failover in PostgreSQL replication, and some example scenarios where failover can be useful.

How to Recover MySQL Galera Cluster from an Asynchronous Slave?

What do you do if you lose your Galera Cluster? A simple solution is to failover to an asynchronous slave. The slave would immediately serve up-to-date data to applications, with minimal downtime. But then, with the slave being the new source of truth, how do you recover your Galera Cluster?

A Performance Cheat Sheet for PostgreSQL

Performance tuning is not trivial, but you can go a long way with a few basic guidelines. In this blog, we will discuss how you analyze the workload of the database, and then review  a list of important configuration parameters to improve the performance of PostgreSQL.

ChatOps - Managing MySQL, MongoDB & PostgreSQL from Slack

CCBot helps you monitor and manage your database Infrastructure from Slack. ChatOps is about bringing your DevOps work to your chats and conversations within a team, e.g. Slack. You can deploy database clusters, get status information, trigger backups, add nodes to your cluster or replication setup by talking to a chatbot, which understands ClusterControl commands.

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.