Guide to Troubleshooting High CPU Usage in Linux When No High Usage Applications Are Found In Linux systems, we often encounter a “strange” situation: when using conventional tools like top or ps, the CPU usage remains persistently high (even spiking to 100%), yet we cannot find the corresponding application that is consuming high CPU resources. … Read more
1. Introduction: Why is the system slow when CPU usage is low? One early morning, a monitoring alert went off: “Server load average spiked to 20!” You quickly log into the server: $ uptime 12:30:01 up 30 days, 5:22, 2 users, load average: 20.12, 18.45, 15.67 Next, check <span>top</span>: %Cpu(s): 2.1%us, 0.5%sy, 0.0%ni, 97.0%id, 0.3%wa, … Read more
The idle task is a core task automatically managed by the FreeRTOS kernel, designed to ensure the basic operation of the system when no user tasks are running. This article provides a comprehensive explanation from four dimensions: lifecycle, core functions, practical code, and execution flow, along with best practices. 01 — The Lifecycle of the … Read more
A Comprehensive Guide to Linux Server Performance Troubleshooting Server Performance Troubleshooting Introduction: At 2 AM, my phone suddenly buzzed—”CPU usage has soared to 95%!” As an operations engineer, have you ever experienced such a “firefighting” moment? Don’t panic! Master this set of performance troubleshooting “combination punches”, and you can identify the root cause in 3 … Read more
Determining which program (or thread) is consuming the most CPU in a Linux system and pinpointing the specific code location is a classic issue in system performance troubleshooting. I will provide you with a complete guide from macro to micro, from simple to in-depth. Overview: Two Steps to Solve the Problem Identify High CPU Processes: … Read more
Having worked in operations for several years, I still remember when I first started; I only knew how to use some basic commands, and when writing scripts, I kept them as simple as possible, which often resulted in long and messy scripts. If I had known some advanced commands, such as the xargs command, pipe … Read more
CPU usageis essentially the CPU resources consumed by the programs you are running, indicating the status of your machine’s running programs at a certain point in time. A higher usageindicates that your machine is running many programs at that time, while a lower usage indicates fewer programs. In the previous article, we discussed how to … Read more
Usage of Could Could itself indicates ability or possibility, often used to refer to the past, but can also refer to the present, where it typically indicates a hypothetical situation or serves as a polite form of can. ❶ Indicates ability. For example: Could I help you? (A more polite way to ask than Can … Read more
A server running on a Linux operating system exhibits various parameter information, which can often help quickly locate and track issues. Here are just a few simple tools to view system-related parameters. Many tools work by analyzing data from /proc and /sys, while more detailed and professional performance monitoring and tuning may require more specialized … Read more
Addressing high CPU usage, stalled download progress, and frequent crashes of Baidu Netdisk on Linux. Resolving High CPU Usage of Baidu Netdisk on Linux As summer arrives, the CPU temperature displayed by conky during Baidu Netdisk downloads skyrockets to 99 degrees Celsius, with the fan roaring, yet the CPU usage shows only 4%. Even after … Read more