This article presents a systematic, evidence‑driven process for locating and resolving high CPU usage on Linux servers, covering environment preparation, layered troubleshooting from whole‑machine to thread level, concrete command examples, real‑world case studies, best‑practice recommendations, and monitoring configurations.
When a Linux server’s load spikes, you can quickly pinpoint CPU, memory, disk I/O, and network bottlenecks by running ten concise commands—uptime, dmesg, vmstat, mpstat, pidstat, iostat, free, sar, and top—each providing specific metrics for rapid troubleshooting.
The article outlines a rapid, one‑minute health check for Linux servers using ten common command‑line tools—uptime, dmesg, vmstat, mpstat, pidstat, iostat, free, sar, and top—to quickly reveal CPU, memory, I/O, network saturation and error conditions before deeper analysis.
When a Linux server shows performance problems, the first 60 seconds are critical; using ten standard command‑line tools such as uptime, dmesg, vmstat, mpstat, pidstat, iostat, free, sar, and top lets you quickly assess load, memory, I/O, and network health to pinpoint the root cause.
This guide explains how to install the sar (System Activity Reporter) tool on Ubuntu, describes its syntax and options, and provides detailed examples for monitoring CPU, memory, I/O, and network metrics, plus an overview of the ksar graphical front‑end.
When you log into a Linux server for performance troubleshooting, Netflix’s engineering team shows that running ten standard command‑line tools within the first minute gives a comprehensive view of system load, resource saturation, errors, and bottlenecks, enabling rapid root‑cause analysis.
This guide introduces essential Linux I/O monitoring tools—including iostat, iotop, sar, dstat, nmon, Zabbix, and Cacti—explaining their installation, key commands, and how to interpret their output for effective system performance analysis.
This guide introduces the powerful sysstat suite, explains how to install sar, outlines its key features and statistics, and provides step‑by‑step commands for troubleshooting CPU, memory, I/O, and network problems on Linux servers.
When a Linux server suddenly spikes in load, this guide shows how to pinpoint the root cause within a minute by running ten key commands that reveal CPU, memory, disk I/O, and network metrics.
The article explains why iostat’s %util and svctm values, reliable for traditional disks, become misleading on modern SSDs and RAID arrays, and provides step‑by‑step methods, formulas, and practical benchmarks to reinterpret these metrics for accurate storage performance analysis.
This guide explains how to install the sar tool on various Unix-like systems, configure its data retention and collection intervals, export performance metrics in formats such as CSV, XML, and JSON, and visualize the results using built‑in or third‑party graphing utilities.
Sysstat is a powerful Linux suite offering tools such as iostat, mpstat, pidstat, sar, and more for detailed CPU, I/O, memory, and network monitoring, and this guide explains its features, recent 11.0.0 enhancements, installation from source, configuration, and upgrade procedures.
This article explains how to use the sar (System Activity Reporter) tool on Linux to collect and analyze performance data, covering past and real‑time statistics, CPU, memory, I/O and swap metrics, installation steps, and a full list of command‑line options.
