This returns the same statistics as top or vmstat but is limited to CPU statistics.
This is primarily used to get details on virtual memory usages but also includes some CPU metrics similar to the top command:Īnother command for getting processor statistics is mpstat. With pidstat, you can also query statistics for a specific process by its process ID or PID, as follows: Use the following command to monitor CPU consumed by MySQL (or any other task name): While top is used to get an overview of all running processes, the command pidstat can be used to monitor CPU utilization by an individual process or program.
$ sudo apt-get install htop # one time command You will need to install htop separately: This is the same process monitor as top, but a little easier to use, and it provides text graphs for CPU and memory utilization. Optionally, you can use the htop command. The CPU is still underutilized, with 58% time in idle processes: To start top, simply type in top in your command prompt and press Enter:Īs you can see in the preceding screenshot, a single Python process is using 80% of CPU time. All metrics are updated at a predefined interval of three seconds. This includes CPU usage, memory and swap utilization, running processes, and their respective resource consumption, and so on. The top command shows a summarized view of various resource utilization metrics. Let's start with the most commonly used monitoring command that is top command. You may need sudo privileges to execute some commands. We will look at some common tools used to get CPU usage details. In this recipe, we will focus on tracking CPU performance. Most of the time, you will find higher CPU use, but in reality, the CPU is waiting for data to become available.
Tracking exact CPU usage is quite a confusing task. Generally, the CPU spends a big part of processing time waiting for synchronous IO to fetch data from the disk or from a network device. The processing power is still far ahead of the data transfer speeds of I/O devices and networks.
Modern CPUs generally do not become bottlenecks for performance.
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