Cpu Memory

Common Problems 120549

Debian 11 Memory Pressure Triggers OOM Kills

🔴 Critical   ⏱ 5–30 min  Last verified: 23 August 2022 Affected versions: Debian 11 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & […]

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Common Problems 114557

Poor Performance From Incorrect tuned Profile

🟡 Medium   ⏱ 5–30 min  Last verified: 23 August 2022 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & Cross-Refs References & Further […]

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How to Tune Scheduler with schedo on IBM AIX 7.3 — step-by-step IBM AIX 7.3 tutorial on Progressive Robot

How to Tune Scheduler with schedo on IBM AIX 7.3

Introduction IBM AIX 7.3 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.3 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to tune scheduler with schedo on IBM AIX 7.3 with […]

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How to Set Up Vagrant and VirtualBox on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Set Up Vagrant and VirtualBox on RHEL 9

Vagrant is a command-line tool for creating and managing reproducible local development environments backed by virtual machines. Combined with VirtualBox as a hypervisor, it lets developers spin up a fresh Linux VM with a single command, configure it through a version-controlled Vagrantfile, and destroy it just as easily. This eliminates the “works on my machine” […]

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How to Configure Windows Server 2019 Server Core — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure Windows Server 2019 Server Core

How to Configure Windows Server 2019 Server Core Windows Server 2019 Server Core is a minimal installation option that omits the Windows graphical user interface (GUI), Internet Explorer, and many optional Windows components. The result is a smaller attack surface, lower memory and disk footprint, fewer required patches, and improved performance compared to the full […]

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How to Install Graylog for Centralised Log Management on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install Graylog for Centralised Log Management on RHEL 7

How to Install Graylog for Centralised Log Management on RHEL 7 Centralised log management is essential for any production environment. When servers, applications, and network devices each write logs independently, troubleshooting incidents becomes painfully slow. Graylog solves this by aggregating logs from every source into a single, searchable platform. Built on top of MongoDB and […]

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How to Install Buildah Container Image Builder on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Install Buildah Container Image Builder on Debian 11

Introduction This guide explains how to Install Buildah Container Image Builder on Debian 11 on Debian 11 Bullseye. Debian Bullseye uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 11 install with […]

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How to Monitor LPAR Resources with lparstat on IBM AIX 7.3 — step-by-step IBM AIX 7.3 tutorial on Progressive Robot

How to Monitor LPAR Resources with lparstat on IBM AIX 7.3

Introduction IBM AIX 7.3 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.3 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to monitor lpar resources with lparstat on IBM AIX 7.3 […]

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How to Configure Docker Overlay Networking on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Configure Docker Overlay Networking on Debian 11

Introduction Deploying configure docker overlay networking on debian 11 on a Debian 11 Bullseye machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Before you […]

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How to Configure Nginx as a TCP/UDP Load Balancer on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Configure Nginx as a TCP/UDP Load Balancer on Debian 11 (ON-DEBIAN-11)

Introduction Deploying configure nginx as a tcp/udp load balancer on debian 11 on a Debian 11 Bullseye machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. […]

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