Tagged articles

kernel parameters

28 articles · Page 1 of 1

Jun 22, 2026 · Operations

How to Tune Nginx Kernel Parameters for Up to 10× Performance Boost

The article walks through a step‑by‑step Nginx performance tuning guide, covering worker_processes and worker_connections settings, Linux file‑descriptor limits, sysctl tweaks such as net.core.somaxconn and tcp_max_syn_backlog, explicit listen backlog, and zero‑copy sendfile with tcp_nopush/tcp_nodelay to dramatically increase throughput and lower CPU usage.

High concurrencyPerformance TuningZero‑copy

0 likes · 4 min read

How to Tune Nginx Kernel Parameters for Up to 10× Performance Boost

Deepin Linux

Mar 18, 2026 · Operations

Unlock Linux Secrets: Master the /proc Filesystem for Monitoring & Debugging

This article explains the Linux /proc virtual filesystem, detailing its structure, dynamic file generation, key system and process files, and how to use it for real‑time monitoring, performance tuning, kernel parameter tweaking, and troubleshooting, complete with practical command examples and a sample monitoring script.

LinuxPerformance TuningProc Filesystem

0 likes · 26 min read

Unlock Linux Secrets: Master the /proc Filesystem for Monitoring & Debugging

Ops Community

Nov 19, 2025 · Operations

Why Are Your TCP Packets Dropping? A 3‑Day Capture Walkthrough to Kernel Parameter Fixes

This guide walks you through diagnosing intermittent TCP packet loss and latency spikes on Linux servers, from initial symptom checks and anti‑pattern warnings to detailed sender‑side, network‑link, and receiver‑side investigations using tcpdump, netstat, ss, and kernel tuning, complete with scripts, best‑practice tables and FAQ.

LinuxPacket lossTCP

0 likes · 37 min read

Why Are Your TCP Packets Dropping? A 3‑Day Capture Walkthrough to Kernel Parameter Fixes

Liangxu Linux

Nov 15, 2025 · Operations

How Many Files and TCP Connections Can a Linux Server Actually Handle?

This article explains the Linux kernel parameters that limit the number of open files and TCP connections, shows how to adjust them, estimates realistic connection counts based on memory, and discusses client‑side port constraints and related practical issues.

LinuxSystem TuningTCP connections

0 likes · 14 min read

How Many Files and TCP Connections Can a Linux Server Actually Handle?

MaGe Linux Operations

Nov 5, 2025 · Operations

Unlock Million-Connection Web Servers: Essential Linux sysctl Tuning Guide

This comprehensive guide explains how to optimize Linux kernel parameters with sysctl for high‑traffic web services, covering prerequisite hardware, network and memory settings, step‑by‑step configuration, verification, common pitfalls, monitoring, and rollback procedures to achieve stable million‑connection performance.

Linuxkernel parametersnetwork-tuning

0 likes · 51 min read

Unlock Million-Connection Web Servers: Essential Linux sysctl Tuning Guide

Raymond Ops

Sep 3, 2025 · Operations

Boost Linux Server Performance: Essential Kernel and Sysctl Tweaks

Learn how to optimize Linux server performance by permanently disabling SELinux, setting runlevel 3, increasing file descriptor limits, fine-tuning kernel network parameters via /etc/sysctl.conf, configuring firewall settings, and handling common issues such as too many open files and connection timeouts.

LinuxOperationsPerformance Tuning

0 likes · 7 min read

Boost Linux Server Performance: Essential Kernel and Sysctl Tweaks

MaGe Linux Operations

Aug 23, 2025 · Operations

Unlock Hidden Linux System Tweaks: Secrets 99% of Engineers Miss

This guide presents a collection of advanced Linux performance optimizations—including kernel parameter tweaks, filesystem and I/O settings, CPU affinity, memory management, network tuning, and automated monitoring scripts—demonstrated with a real‑world e‑commerce case study that boosted QPS from 2 000 to 12 000 and reduced latency by 75%.

Performance TuningSystem Optimizationkernel parameters

0 likes · 13 min read

Unlock Hidden Linux System Tweaks: Secrets 99% of Engineers Miss

Efficient Ops

Jun 30, 2025 · Operations

Why TIME_WAIT Connections Exhaust Your Server and How to Fix Them

TIME_WAIT is a TCP state that appears on the side actively closing a connection; when many sockets linger in this state, ports are exhausted, causing connection failures, and the article explains typical scenarios, underlying causes, kernel limits, and practical client‑ and server‑side solutions.

Connection ManagementLinuxNetwork Operations

0 likes · 5 min read

Why TIME_WAIT Connections Exhaust Your Server and How to Fix Them

MaGe Linux Operations

May 27, 2025 · Operations

Master Linux Kernel Tuning: From Theory to Practical Sysctl Configuration

Learn how to configure and verify essential Linux kernel parameters using sysctl, covering temporary and permanent settings, container-specific adjustments, validation techniques, common pitfalls, and best practices to boost network performance, stability, and security for system administrators and DevOps engineers.

Performance Tuningdevopskernel parameters

0 likes · 9 min read

Master Linux Kernel Tuning: From Theory to Practical Sysctl Configuration

Liangxu Linux

May 13, 2025 · Operations

Boost Linux Server Performance: Essential Kernel Tweaks and Sysctl Settings

Learn how to permanently disable SELinux, set runlevel to 3, increase file descriptor limits, fine‑tune kernel sysctl parameters, configure firewall settings, and resolve common Linux performance issues such as too many open files and connection timeouts to dramatically improve server throughput.

Performance Tuningkernel parametersserver optimization

0 likes · 7 min read

Boost Linux Server Performance: Essential Kernel Tweaks and Sysctl Settings

Open Source Linux

Mar 17, 2025 · Operations

Boost Linux Server Performance: Essential Kernel and Sysctl Tweaks

Learn how to permanently disable SELinux, set runlevel to 3, increase file descriptor limits, fine-tune kernel network parameters via /etc/sysctl.conf, configure firewall settings, and address common Linux performance issues such as too many open files and TIME_WAIT overloads.

LinuxPerformance Tuningkernel parameters

0 likes · 8 min read

Liangxu Linux

Mar 4, 2025 · Operations

Master Linux TCP Settings: Tuning /proc/sys/net/ipv4 and Core Parameters

This guide explains the purpose of Linux kernel TCP parameters under /proc/sys/net/ipv4 and /proc/sys/net/core, shows recommended values for security and performance, and provides step‑by‑step methods to view and permanently modify these settings using echo, sysctl.conf, and the sysctl command.

Networkkernel parameters

0 likes · 15 min read

Master Linux TCP Settings: Tuning /proc/sys/net/ipv4 and Core Parameters

ITPUB

Dec 10, 2024 · Operations

How Many Files and TCP Connections Can a Linux Server Actually Handle?

Linux treats everything as a file, so the maximum number of open files and TCP connections a server can support depends on kernel parameters like fs.file-max, soft/hard nofile, and fs.nr_open, as well as memory size, port limits, and proper configuration to avoid 'too many open files' errors.

LinuxSystem TuningTCP connections

0 likes · 15 min read

Java Architecture Stack

Oct 11, 2024 · Operations

25 Proven Linux Performance Tuning Tricks to Boost System Speed

Learn 25 practical Linux performance tuning techniques—from adjusting kernel parameters like swappiness and ulimit to optimizing I/O schedulers, network buffers, and enabling HugePages—each with clear commands and step‑by‑step instructions to help you maximize system responsiveness and throughput.

I/O schedulerLinuxMonitoring

0 likes · 10 min read

25 Proven Linux Performance Tuning Tricks to Boost System Speed

Liangxu Linux

Oct 28, 2023 · Operations

Mastering Linux TCP Performance: Tuning Queues, Buffers, and Offloading

This guide explains how to optimize Linux TCP performance by classifying and tuning kernel parameters related to connection establishment, packet reception, and packet transmission, covering queues, buffers, NIC bonding, multi‑queue IRQ affinity, RingBuffer settings, and offloading features.

BuffersPerformance Tuningkernel parameters

0 likes · 14 min read

Mastering Linux TCP Performance: Tuning Queues, Buffers, and Offloading

MaGe Linux Operations

Sep 14, 2023 · Operations

9 Essential Linux Server Optimization Tips for Faster, Safer Operations

This guide presents nine practical Linux server optimization techniques—including time synchronization, SYN‑cookie protection, Squid and Nginx tuning, file‑descriptor limits, service minimization, IPv6 disabling, NIC activation, and memory‑management insights—to boost precision, stability, performance, and security.

LinuxNetworkPerformance Tuning

0 likes · 8 min read

9 Essential Linux Server Optimization Tips for Faster, Safer Operations

Architects' Tech Alliance

Jun 28, 2023 · Operations

Master Linux Performance: 8 Essential Tuning Techniques & Tools

This guide outlines eight practical Linux performance‑tuning methods—including kernel parameter tweaks, filesystem and network optimizations, process priority adjustments, memory management, scheduler configuration, software bloat removal, and log cleanup—while showcasing key tools and visual diagrams for effective system optimization.

FilesystemLinuxNetwork

0 likes · 5 min read

Master Linux Performance: 8 Essential Tuning Techniques & Tools

Efficient Ops

Jan 12, 2023 · Cloud Native

How to Scale Kubernetes Clusters: Node Quotas, Kernel Tweaks, and Etcd Best Practices

This guide explains how to adjust node quotas, kernel parameters, and etcd configurations for large Kubernetes clusters, covering cloud provider limits, GCE and Alibaba Cloud settings, API server tuning, and pod resource best practices to ensure reliable scaling and performance.

Node QuotasPod QoScluster scaling

0 likes · 7 min read

How to Scale Kubernetes Clusters: Node Quotas, Kernel Tweaks, and Etcd Best Practices

Su San Talks Tech

Oct 11, 2022 · Operations

How to Optimize Server Performance: Config, Load Analysis & Kernel Tuning

This guide explains how to choose appropriate server hardware, analyze CPU, memory, disk I/O and network load, and fine‑tune kernel parameters such as file limits and TCP settings to achieve reliable high‑concurrency performance.

Htopiostatkernel parameters

0 likes · 13 min read

How to Optimize Server Performance: Config, Load Analysis & Kernel Tuning

macrozheng

Jul 1, 2022 · Operations

How to Optimize Server Performance: Config, Load Analysis, and Kernel Tuning

Learn practical methods to boost server performance by selecting appropriate hardware configurations, analyzing CPU, memory, disk I/O and network loads, and fine‑tuning kernel parameters such as file limits and TCP settings, with step‑by‑step commands and monitoring tools like htop, iostat, and nload.

LinuxMonitoringPerformance Tuning

0 likes · 14 min read

How to Optimize Server Performance: Config, Load Analysis, and Kernel Tuning

G7 EasyFlow Tech Circle

Dec 30, 2021 · Cloud Native

Why Kubernetes OOM Kills Use WSS, Not RSS – Diagnose & Fix Container Memory

After moving IoT services to Kubernetes, containers were OOM‑killed despite RSS staying below limits because Kubernetes bases OOM decisions on the Working Set Size (WSS) metric, which includes file cache, and the article explains its calculation, reproduces the issue, and offers practical mitigation strategies.

Cache ManagementContainer MemoryOOM

0 likes · 12 min read

Why Kubernetes OOM Kills Use WSS, Not RSS – Diagnose & Fix Container Memory

Liangxu Linux

Oct 17, 2021 · Cloud Native

How to Scale Kubernetes Clusters: Node Quotas, Kernel Tweaks, and Best Practices

This guide explains how to prepare large‑scale Kubernetes clusters on public clouds by expanding node quotas, tuning kernel parameters, configuring high‑availability etcd, adjusting kube‑apiserver limits, and applying pod‑level resource and affinity best practices.

EtcdKubeAPIServerNode Quotas

0 likes · 8 min read

How to Scale Kubernetes Clusters: Node Quotas, Kernel Tweaks, and Best Practices

Full-Stack DevOps & Kubernetes

Sep 7, 2020 · Cloud Native

How to Scale a Kubernetes Cluster: Node Quotas, Kernel Tweaks, and Component Settings

This guide explains how to prepare a large‑scale Kubernetes cluster by increasing cloud resource quotas, adjusting kernel parameters, configuring master node sizes, optimizing etcd storage, tuning Docker and Kubelet image pull settings, and applying best‑practice pod and scheduler configurations for thousands of nodes.

Image PullNode QuotasPod Configuration

0 likes · 11 min read

How to Scale a Kubernetes Cluster: Node Quotas, Kernel Tweaks, and Component Settings

Refining Core Development Skills

Jun 5, 2020 · Fundamentals

Linux Write Operation: How Data Flows from User Space to Disk

This article explains how Linux write operations work internally, detailing how data flows from user space through the kernel's page cache to disk, including the timing of actual disk writes and kernel parameters that control writeback behavior.

SystemTapWrite Operationsext4 filesystem

0 likes · 8 min read

Linux Write Operation: How Data Flows from User Space to Disk

Huawei Cloud Developer Alliance

Nov 28, 2019 · Operations

Master Disk I/O Performance Tuning on Kunpeng Processors: Tools & Tips

This guide explains how to optimize disk I/O on Kunpeng processors by outlining the underlying performance bottlenecks, introducing essential monitoring tools like iostat, and detailing practical kernel and filesystem tuning methods—including dirty page settings, read-ahead adjustments, I/O scheduler selection, and XFS configuration.

KunpengLinuxPerformance Tuning

0 likes · 15 min read

Master Disk I/O Performance Tuning on Kunpeng Processors: Tools & Tips

Aikesheng Open Source Community

Dec 30, 2018 · Operations

Analysis of TCP Connection Failures Caused by ARP Queue Length (unres_qlen) in Linux Kernels

The article investigates intermittent TCP connection failures during application server startup caused by the Linux kernel ARP queue length parameter unres_qlen, reproduces the issue with a concurrent connection test, analyzes kernel internals, and recommends increasing unres_qlen for kernels prior to 3.3.

Connection PoolingTCParp

0 likes · 8 min read

Analysis of TCP Connection Failures Caused by ARP Queue Length (unres_qlen) in Linux Kernels

ITPUB

Mar 2, 2016 · Operations

How to Fix VMware Guest OS Clock Running Too Fast or Too Slow

This guide explains why a VMware guest OS may show time that runs faster or slower than real time and provides step‑by‑step instructions—including installing VMware Tools, enabling time synchronization, and adding specific kernel parameters—to correct the clock on Linux guests.

Guest OSLinuxVMware

0 likes · 4 min read

How to Fix VMware Guest OS Clock Running Too Fast or Too Slow

Alibaba Cloud Infrastructure

Apr 30, 2015 · Operations

Understanding and Tuning Linux TCP Queue and Buffer Parameters

This article explains the Linux TCP connection‑establishment, packet‑receive, and packet‑send paths, categorizes related kernel parameters such as backlog, SYN‑cookie, ring buffers, and socket buffers, and provides practical commands and guidelines for optimizing network performance on servers.

BufferLinuxNetwork Performance

0 likes · 13 min read

Understanding and Tuning Linux TCP Queue and Buffer Parameters