Rotating MySQL logs is important because logs can take up a lot of disk space if left unmanaged. For example, an untuned database can lead to a lot of slow queries being logged. The error log can become large if it includes notes and warnings. Additionally, binlogs...
Database administrators need to know databases as well as the operating system (OS) their database is running on. Bash scripting is where the two merge. For the beginner, bash scripting can be intimidating, but all have the same basic structure: a beginning, middle,...
The error log is an important tool for troubleshooting. The size of the error log file can get quite large if left unattended. For starters, there are not many parameters that can be adjusted to impact its size in any way, unlike the binlog that has a few system...
Binary logs play an important role in replication and data recovery. In replication, source databases communicate data changes recorded in its binary logs to the replica's relay logs. They can also be used to repair a replica experiencing data drift. In a similar way,...
MySQL 5.6 reached its end-of-life (EOL) in February 2021. If you haven't upgraded to MySQL 5.7, you are not the only one. It can be an intimidating endeavor. There are configuration, system table, server, Innodb and SQL changes to consider. And, documentation is not...
When performing health checks on a database, I look at how many users are granted SUPER privileges. If you're reading this, you know why. SUPER privileges pose a potential security risk and should be limited to a few users that need this far-reaching access to...
For this example, the following software versions were in use: Ubuntu v20.04.3MySQL server v5.7.35Percona XtraBackup v2.4.24 It is important to note that Percona XtraBackup 8.0 is not compatible with MySQL version 5.7 and was introduced for use with MySQL version 8.0....
This blog article will explain what the SST method choices are and what you need to consider when choosing one over another. To start with, the wsrep_sst_method is a configuration parameter used with Galera Clustering. This parameter tells the database server which...
Encrypted connections for MySQL replication are the default as of 8.0. The following simple example shows a basic setup for encrypted replication using Ubuntu 20.04 and MySQL Community 8.0.27. The steps may be similar for other Linux distributions. The necessary files...
What is a deadlock and what exactly does it mean in regards to databases? In order to fully define what a deadlock is, it's important to note that a 'lock' itself occurs when multiple processes are simultaneously trying to access the same resource. A deadlock occurs...