This article teaches Linux performance troubleshooting beyond top, covering vmstat, mpstat, pidstat, iostat, sar, perf, and bpftrace with real-world scenarios, key metrics, step-by-step diagnosis flows, and practical fixes for CPU, memory, disk, network, and context-switch issues.
This article compiles a comprehensive guide to Linux performance analysis utilities, covering basic commands like vmstat, iostat, dstat, top, htop, and advanced tools such as perf, eBPF, Flame Graphs, and sar, with usage examples, output explanations, and practical tips for system monitoring and tuning.
The article presents nine diagrams that illustrate Linux performance tooling categories—including observability, static analysis, benchmarking, tuning, sar, perf-tools, tracing, and BPF tools—providing a quick visual reference for system engineers.
This guide covers Linux performance analysis tools—including top, htop, iotop, pidstat, iostat, sar, and vmstat—detailing installation, usage, key metrics, troubleshooting scenarios, monitoring integration with Prometheus, and best‑practice recommendations for effective system diagnostics and capacity planning.
When Linux servers experience sudden hangs without logs or CPU spikes, memory shortages are often the hidden culprit, and this article walks developers and ops engineers through using free for quick checks, vmstat for comprehensive diagnostics, and sar for long‑term monitoring, plus a three‑step troubleshooting workflow.
This article introduces five essential Linux performance monitoring commands—vmstat, iostat, free, df, and sar—detailing their purpose, key options, example usages, and the meaning of each output column to help you effectively track system resources.
This guide explains how to monitor memory usage on a Linux 7.9 system using a variety of commands and tools—including free, /proc/meminfo, vmstat, top, htop, sar, smem, glances and ps_mem—showing key metrics, options, example outputs and interpretation tips for both servers and desktops.
This article introduces five Linux commands—vmstat, iostat, free, df, and sar—explaining their purpose, common options, example usages, and the meaning of each column in their output to help you monitor memory, CPU, I/O, and filesystem performance in real time.
This article explains how to use essential Linux commands such as uptime, dmesg, vmstat, mpstat, pidstat, iostat, free, sar, and top to monitor system load, CPU usage, memory, I/O, and network activity, interpreting their outputs for effective troubleshooting.
This guide walks you through the most common Linux system‑monitoring utilities—top, htop, vmstat, dstat, glances and sar—detailing their purpose, syntax, frequently used options, and practical command‑line examples so you can quickly assess CPU, memory, I/O, and overall system health.
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.
This guide explains how to use common Linux monitoring utilities—top, vmstat, pidstat, iostat, sar, netstat, and tcpdump—to observe CPU, memory, disk I/O, and network performance, interpret their output, and troubleshoot system bottlenecks effectively.
This article provides a thorough, step‑by‑step guide to using the Linux sar command for real‑time and historical monitoring of CPU, memory, I/O, and network statistics, including syntax, sample outputs, installation tips, common pitfalls, and data‑export techniques.
This guide shows how to install and use nload, iftop, and sar for live network bandwidth monitoring on Linux, explains their key parameters, and provides two shell scripts that calculate per‑second inbound and outbound traffic from /proc/net/dev.
This guide shows how to install and use nload, iftop, and sar for real‑time network traffic monitoring on Linux, explains each tool's key parameters, and provides two custom shell scripts that calculate per‑second inbound and outbound traffic using /proc/net/dev.
This guide walks through dozens of Linux performance‑monitoring utilities—including top, perf, sar/ksar, mpstat, uptime, vmstat, pidstat, htop, atop, glances, nmon, pcp‑gui, collectl, and colplot—explaining what each tool measures, how to invoke it, key command‑line options, sample outputs, and where to find further documentation.
This guide explains how to use Linux built‑in tools (iostat, iotop, sar, dstat) and popular monitoring solutions (nmon, Zabbix, Cacti) to collect, interpret, and visualize disk I/O metrics such as throughput, latency, and utilization for performance troubleshooting.
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.
This article provides a comprehensive guide to Linux performance analysis, covering background concepts, detailed explanations of tools such as vmstat, iostat, dstat, iotop, pidstat, top/htop, mpstat, netstat, ps, strace, lsof, perf, and sar, along with practical command examples and usage tips.
This article introduces the Linux sar command, explains its syntax and common options, and demonstrates how to sample and interpret CPU, memory, I/O, process queue, and swap metrics to identify system bottlenecks during performance testing.
This guide explains how to use iostat, free, sar, and top commands to monitor disk I/O, memory usage, network throughput, and CPU load on a Linux server, interpreting key metrics to identify performance bottlenecks.
This article provides a comprehensive overview of the Linux sar command, explaining its syntax, common options, example use‑cases for CPU, memory, I/O and process monitoring, and how to interpret the output fields to identify system bottlenecks.
This guide explains Linux memory fundamentals, clarifies the meanings of VIRT, RES, and SWAP, shows how to quickly check memory status with top and free, distinguishes buffers from cache, and provides practical tips using sar and vmstat to identify real memory shortages.
This guide explains how to install, configure, and use the sar (System Activity Reporter) tool on Linux to monitor CPU, memory, I/O, and load metrics, helping you pinpoint performance bottlenecks through various command options and detailed reports.
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.
This guide reviews eleven Linux tools and commands—including iptraf, sar, ntop, and tcpdump—for monitoring network traffic, explains installation steps for various distributions, and describes how to interpret their output, helping administrators keep web servers performant and secure.
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.
