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What to Check if MySQL Memory Utilisation is High
One of the key factors of a performant MySQL database server is having good memory allocation and utilization, especially when running it in a production environment. But how can you determine if the...
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My PostgreSQL Database is Out of Disk Space
Disk space is a demanding resource nowadays. You usually will want to store data as long as possible, but this could be a problem if you don’t take the necessary actions to prevent a potential “out of...
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How to Identify PostgreSQL Performance Issues with Slow Queries
When working with OLTP (OnLine Transaction Processing) databases, query performance is paramount as it directly impacts the user experience. Slow queries mean that the application feels unresponsive...
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How to Protect Your MySQL & MariaDB Database Against Cyberattacks When on a...
It is sometimes inevitable to run MySQL database servers on a public or exposed network. This is a common setup in a shared hosting environment, where a server is configured with multiple services and...
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What to Look for if Your PostgreSQL Replication is Lagging
Replication lag issues in PostgreSQL is not a widespread issue for most setups. Although, it can occur and when it does it can impact your production setups. PostgreSQL is designed to handle multiple...
View ArticleSenior Engineering Manager
We are looking for a highly motivated, experienced Senior Engineering Manager to work closely with product management and business stakeholders.Our microservices backend architecture and cloud platform...
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An Introduction to Percona Server for MongoDB 4.2
When choosing a NoSQL database technology important considerations should be taken into account, such as performance, resilience, reliability, and security. These key factors should also be aligned...
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How to Rebuild an Inconsistent PostgreSQL Slave
PostgreSQL Streaming Replication is a great way of scaling PostgreSQL clusters and doing it adds high availability to them. As with every replication, the idea is that the slave is a copy of the master...
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How to Enable TimescaleDB on an Existing PostgreSQL Database
If you have a PostgreSQL cluster up-and-running, and you need to handle data that changes with time (like metrics collected from a system) you should consider using a time-series database that is...
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Using MariaDB Flashback on a MySQL Server
MariaDB has introduced a very cool feature called Flashback. Flashback is a feature that will allow instances, databases or tables to be rolled back to an old snapshot. Traditionally, to perform a...
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Setting Up a Geo-Location Database Cluster Using MySQL Replication
A single point of failure (SPOF) is a common reason why organizations are working towards distributing the presence of their database environments to another location geographically. It's part of the...
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How to Easy Manage Database Updates and Security Patches
Database security requires careful planning, but it is important to remember that security is not a state, it is a process. Once the database is in place, monitoring, alerting and reporting on changes...
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How to Rebuild an Inconsistent MySQL Slave?
MySQL slaves may become inconsistent. You can try to avoid it, but it’s really hard. Setting super_read_only and using row-based replication can help a lot, but no matter what you do, it is still...
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How High CPU Utilization Effects Database Performance
One of the indicators to see if our database is experiencing performance issues is by looking at the CPU utilization. High CPU usage is directly proportional to disk I/O (where data is either read or...
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How to Fix a Lock Wait Timeout Exceeded Error in MySQL
One of the most popular InnoDB's errors is InnoDB lock wait timeout exceeded, for example:SQLSTATE[HY000]: General error: 1205 Lock wait timeout exceeded; try restarting transactionThe above simply...
View ArticleAn Overview of Generated Columns for PostgreSQL
PostgreSQL 12 comes with a great new feature, Generated Columns. The functionality isn’t exactly anything new, but the standardization, ease of use, accessibility, and performance has been improved in...
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An Overview of Client-Side Field Level Encryption in MongoDB
Data often requires high end security on nearly every level of the data transaction so as to meet security policies, compliance, and government regulations. Organization reputation may be wrecked if...
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How to Install and Configure MaxScale for MariaDB
There are different reasons for adding a load balancer between your application and your database. If you have high traffic (and you want to balance the traffic between different database nodes) or you...
View ArticleA Message from Our CEO on the COVID-19 Pandemic
We wanted to take a moment to address how Severalnines is handling the Covid-19 pandemic. We have employees scattered across 16 countries over 5 continents, this means that some of our employees are at...
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How to Replace an Intermediate MySQL or MariaDB Master with a Binlog Server...
Binary logs (binlogs) contain records of all changes to the databases. They are necessary for replication and can also be used to restore data after a backup. A binlog server is basically a binary log...
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