Severalnines Blog
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14 blog posts in 13 categories

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.

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.

Updated: ClusterControl Tips & Tricks: MySQL Query Performance Tuning

In this blog post, we’ll look into how ClusterControl can help you solve problems related to query performance using the Query Monitor.

The Holy Grail Webinar Replay: MySQL Database Performance Tuning

This is the replay of a webinar that discusses database performance tuning for MySQL databases.

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Become a MySQL DBA blog series - Optimizer Hints for faster query execution

MySQL uses a cost-based optimizer to determine the best way to execute a query. It usually does a great job, but not all the time. There are different reasons for that. In some cases, it might not have enough information about the data and plan queries in a non-optimal way.

Become a MySQL DBA blog series - Using Explain to improve SQL Queries

When it comes to the query tuning, EXPLAIN is one the most important tool in the DBA’s arsenal. Why is a given query slow, what does the execution plan look like, how will JOINs be processed, is the query using the correct indexes, or is it creating a temporary table? In this blog post, we’ll look at the EXPLAIN command and see how it can help us answer these questions.

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.