Author: Zen and the Art of Computer Programming
1 Introduction
With the rapid development of Internet companies' businesses and the increasing complexity of data volume and data characteristics, website access traffic is increasing exponentially. How to effectively monitor and analyze database performance has become an important topic. Due to the systematic performance bottlenecks and resource limitations of the database itself, it is difficult to capture the true operating status of the database using traditional database performance monitoring methods. Therefore, it is necessary to rely on external monitoring tools for more accurate and comprehensive performance monitoring. There are many commonly used database performance monitoring tools on the market, such as open source DBeaver, Navicat, MySQLTuner, etc.; there are also commercial cloud service platforms, such as Amazon CloudWatch, New Relic, etc. Based on these monitoring tools and platforms, developers can help developers understand the current operating status of the database as a whole, and then optimize and manage database resources. In addition, based on these tools, fault diagnosis and disaster recovery drills can also be performed on the database to improve database availability and service quality.
2. Related concepts and terms
2.1 Performance monitoring indicators
CPU Utilization: CPU utilization reflects what tasks the CPU is processing and what work they are doing. If the CPU utilization continues to be higher than a certain threshold (such as 90%), it means that the database is experiencing a resource bottleneck, and there may be a performance bottleneck or deadlock. Usually, the higher the CPU utilization, the better the performance of the database.
Disk IO utilization: Disk IO utilization reflects the speed of disk I/O request processing. During the operation of the database, a large number of file read and write operations will occupy disk resources. Therefore, if the disk IO utilization continues to be low, it means that the disk operation of the database is stable and there will be no obvious performance problems. If the disk IO utilization continues to be higher than a certain threshold (such as 80%), performance problems may occur. For example, query response may occur due to high disk load.