Problem Queries are Killing Your Database Performance

Author: Robert Agar

Tuning database performance is a complicated task that can be a thorn in the side of the database team. There are many interconnected components and environmental aspects that come under consideration when attempting to optimize the performance of your database systems. A DBA can be hard-pressed to determine where to begin their optimization efforts.

An initial investigation may concentrate on the network and hardware on which the database is running. These inquiries may uncover issues that can be easily identified and addressed. It may be a simple matter of adding some disk space or upgrading memory on the database’s server. You might be able to move the database to a less-used network segment to improve the response time when satisfying user requests. Maybe there are conflicting applications or processes on the same server that are impacting the availability of resources to power the database.

Hopefully, some of these steps allow you to achieve the performance gains that you seek. But what if they don’t? Numerous attempts at modifying system parameters and juggling components can leave you right where you started. Your database is still underperforming and pressure is building to resolve the problem. It’s time to dig into the programming logic that provides functionality to the database’s users. Don’t be frightened, but you need to go under the hood and take a look at your SQL queries and optimize the ones that are negatively impacting the system.

Methods of Improving SQL Query Performance

Multiple factors can influence the speed at which SQL queries are executed. This also means that there are a variety of ways to address SQL queries that are causing deficient database performance. If you are responsible for MySQL databases, here are some methods that may improve the execution speed of your SQL queries.

mysql>Alter table students ADD FULLTEXT (first_name, last_name);

mysql>Select * from students where match(first_name, last_name) AGAINST (‘Ade’);

Finding the Right Queries to Optimize

Having techniques that allow you to optimize a database’s SQL queries certainly presents a way to improve the system’s performance. However, you may face some difficulty in establishing which queries deserve your attention. SQL Diagnostic Manager for MySQL furnishes a DBA with a comprehensive performance monitor that can help identify the SQL queries that will provide the greatest benefits by being optimized.

SQL Diagnostic Manager for MySQL provides a host of features that will help you optimize the performance of your MySQL and MariaDB systems. It supplies real-time details of slow or locked queries and allows you to kill them if necessary. You can easily identify the top 10 queries based on execution time, which gives you a great starting point for query optimization. The tool works on databases located on-premises as well as those residing in the cloud. It’s an excellent way to find and address the problem SQL queries that may be dragging down your database performance.