devops-school

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Order;
using System;
using System.Linq;

namespace BenchmarkDotNetLab
{
    // Captures allocations & GC info
    [MemoryDiagnoser]
    // Rank methods from fastest to slowest

devops-school

using System.Diagnostics;
using System.Threading;
using System.Threading.Tasks;

// Minimal API demo to show bad vs good threading practices in .NET

var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

// Simple concurrency metrics

devops-school

using System;
using System.Collections.Generic;
using System.Diagnostics;

class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine("=========================================");
        Console.WriteLine("   .NET GC Generations Demo (Gen0/1/2)   ");

devops-school

using System.Diagnostics;
using System.Text;

var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

// ===============================================
// INTENTIONAL MEMORY LEAK DEMO
// ===============================================
//

devops-school

using System.Diagnostics;
using System.Net;
using System.Security.Authentication;
using System.Threading;

// Simple .NET minimal API to demo TLS 1.2 vs TLS 1.3 impact
// and expose basic in-process metrics at /metrics

var builder = WebApplication.CreateBuilder(args);

devops-school

// ============================================================
// Circular Dependency Example (BAD) + Fixed Example (GOOD)
// Single-file demonstration for training
// ============================================================

using System;
using Microsoft.Extensions.DependencyInjection;

namespace CircularDependencyDemo
{

devops-school

<?php

$host = 'n1smtpout.europe.secureserver.net';
$port = 25;

$from = 'contact@guestpostai.com';
$to   = 'contact@guestpostai.com';

echo "<pre>Connecting to SMTP ($host:$port)...\n";

devops-school

devops-school

Linux + MySQL/MariaDB: “Who’s eating CPU/RAM?” — Handy Commands

Below is a compact, copy-pasteable cheat-sheet to find which process, user, or application is consuming the most CPU and memory, plus MySQL/MariaDB commands to pinpoint hot databases and queries.

---

🧠 Quick System Snapshots

# Top CPU processes (non-interactive)

devops-school

#!/bin/bash

# === Variables ===
DB_NAME="artifactory"
DB_USER="artifactory"
DB_PASS="StrongPassword123!"
ARTIFACTORY_VERSION="7.117.7"

echo "=== JFrog Artifactory $ARTIFACTORY_VERSION Installation Started ==="