Amrit Poudel

@ambroligence

learner

Nepal KathmanduJoined May 2024

Amrit Poudel's blogs

Untitled Blogeramritpoudel.hashnode.dev11 posts

understanding block devices in ubuntudisks.hashnode.dev2 posts

AWS Solution Architect Apprenticeshipawssolutionarchitectapprenticeship.hashnode.dev1 post

system troubleshootsystemtroubleshoot.hashnode.dev1 post

Recently published

systemtroubleshoot.hashnode.dev

🧯 PostgreSQL Production Incident: Understanding a Disk I/O Meltdown After a Holiday Backlog

This article documents a real-world PostgreSQL production incident.All business names, schemas, queries, IPs, and identifiers have been anonymized for confidentiality. 📌 System Overview OS: Ubuntu Server 24.04 LTS Database: PostgreSQL 16.x CPU:...

6d ago6 min read

disks.hashnode.dev

2.reading iostat

Before talking about tuning or root cause, just answer one thing: What do these stats say is happening?Not why. Only what. Fictional iostat -x line Device r/s w/s rkB/s wkB/s await avgqu-sz %util sda 50 10 2000 400 30....

Jan 275 min read

disks.hashnode.dev

Understanding Disks, Part 1: Why Disk I/O Even Exists

Before you look at iostat, before you blame disks, before you scale hardware — you need one correct mental model. Let’s build it. Why does disk I/O even exist? A program never wants disk. A program wants data. Disk I/O happens only in two situations...

Jan 275 min read

awssolutionarchitectapprenticeship.hashnode.dev

AWS Fundamentals: Global Infrastructure and Core Services (Day 1 & Day 2)

Cloud computing is often presented as something abstract and magical. In reality, it is a set of very deliberate engineering decisions designed to solve scale, availability, and security problems.This article documents my Day 1 and Day 2 learning whi...

Dec 28, 20255 min read

eramritpoudel.hashnode.dev

All you need to know about Nginx

Nginx is a high performance web server developed to facilitate the increasing needs of the modern web. It focuses on high performance, high concurrency, and low resource usage. Although it's mostly known as a web server, NGINX at its core is a revers...

Sep 27, 20258 min read