Severalnines Blog
The automation and management blog for open source databases

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21 blog posts in 13 categories

Become a MySQL DBA blog series - Database Indexing

An index is a data structure that sorts a number of records on one or more fields, and speeds up data retrieval. This is to avoid scanning through the disk blocks that a table spans, when searching through the database. So, what kind of indexes are available in MySQL and how do we use them to get the most performance? This will be the topic for this blog.

Become a MySQL DBA blog series - Deep Dive SQL Workload Analysis using pt-query-digest

In our previous post, we showed you how to interpret reports generated by pt-query-digest. Today we’d like to cover some of its more advanced features, as it is a pretty extensive tool with lots of functionality. We’ll also show you what information you should be looking for, and how to derive conclusions based on that data. 

Become a MySQL DBA blog series - Analyzing your SQL Workload using pt-query-digest

Mid to large size applications tend to have hundred of SQL statements distributed throughout a large code base, with potentially hundreds of queries running every second. That can generate a lot of data. How do we identify causes of bottlenecks slowing down our applications? Obviously, going through the information query by query would not be great - we’ll get drowned with all the entries. We need to find a way to aggregate the data and make sense of all that.

Become a MySQL DBA blog series - The Query Tuning Process

Query tuning is something that a DBA does on a daily basis - analyse queries and updates, how these interact with the data and schema, and optimize for performance. This is an extremely important task as this is where database performance can be significantly improved - sometimes by orders of magnitude. 

Become a MySQL DBA blog series - Configuration Tuning for Performance

In this blog post, we’ll discuss some of the settings that are most often tweaked and which can bring you significant improvement in the performance. We will also cover some of the variables which are frequently modified even though they should not. Performance tuning is not easy, but you can go a surprisingly long way with a few basic guidelines.

Become a MySQL DBA blog series - Live Migration using MySQL Replication

This is the seventh installment in the ‘Become a MySQL DBA’ blog series. Our previous posts in the DBA series include Database Upgrades, Replication Topology Changes, Schema Changes, High Availability, Backup & Restore, Monitoring & Trending.

Become a MySQL DBA blog series - Database upgrades

In this blog post, we will cover one of the most basic tasks of the DBA - minor and major database upgrades. This is the sixth installment in the ‘Become a MySQL DBA’ blog series. Our previous posts in the DBA series include Replication Topology Changes, Schema Changes, High Availability, Backup & Restore, Monitoring & Trending.

Become a MySQL DBA blog series - Common operations - Replication Topology Changes

This is the fifth installment in the ‘Become a MySQL DBA’ blog series, and discusses one of the most common operations a DBA has to handle - replication topology changes and planned failover. Our previous posts in the DBA series include Schema Changes, High Availability, Backup & Restore, Monitoring & Trending.

Become a MySQL DBA blog series - Common operations - Schema Changes

This is the fourth installment in the 'Become a MySQL DBA' series, and discusses the different approaches to schema changes in MySQL. Our previous posts in the DBA series include High Availability, Backup & Restore and Monitoring & Trending.

Become a MySQL DBA blog series - Database High Availability

This is the third installment in the ‘Become a MySQL DBA’ series, and discusses the pros and cons of different approaches to high availability in MySQL. Our previous posts in the DBA series include Backup and Restore and Monitoring & trending.