Why is Mysqld.exe using too much CPU?

Mysqld.exe can use a huge amount of CPU for several factors. Consider the following factors.

• Heavy Query Loads: If your MySQL server is processing queries of high volume or complex queries that deal with a large dataset then it can lead to high CPU usage in few cases. Poorly optimized queries can be the main cause for this issue which will force the CPU to consume all of its resources. The Database administrator must ensure to optimize the queries before executing them directly.

• Lack of Indexes: If the tables present in your database are not properly indexed then MySQL will have to perform full table scans to extract the required data which will take a lot of time and your CPU will be overused. So while creating your database you must ensure that your database is properly indexed so that data can be accessed faster.

• Insufficient Hardware Resources: If your server does not have enough CPU power to handle the incoming query load, you may experience high CPU usage. Upgrading to a more powerful CPU or adding additional CPU cores can help alleviate this issue. You can try to upgrade to a CPU having multiple cores like octacore or hexacore which provides a better throughput for the complex operations.

• Long-running Transactions: Transactions that are not committed or aborted can lead to high CPU usage. Make sure to commit any transaction once it’s completed. If not done then the uncommitted transactions will consume a lot of your CPU which will eventually make your system slower.

CPU time is very crucial in computer tasking, programs are built by considering to have high CPU utilization to perform tasks more simultaneously. High CPU utilization is pretty much normal while performing heavy tasks like gaming. But what if lightweight programs also start consuming too much CPU? This would become a serious concern.

In this article, we will discuss different methods to fix the high CPU usage of mysqld.exe in detail. Before exploring why mysqld.exe consumes too much CPU and methods to resolve it, let us understand what it is and how it works.