Systems Internals (118)

Explorations into operating systems, networks, and low-level systems internals.

21 blogs • 26 notes • 71 videos

2026

(29)

Aug 10

NOTE Preventing PostgreSQL database-wide recoveries using strict Linux overcommit

Systems Internals #software-engineering #crash-recovery #databases
Aug 04

NOTE Hidden Systemd Units In Base Images Can Crash Kubernetes Training Jobs

Systems Internals #software-engineering #ai-agents #aws-ecs-agent
Jul 27

NOTE Huge Pages Optimize Postgres Shared Buffers by Improving TLB Efficiency

Systems Internals #distributed-systems #caching #databases
Jun 21

VIDEO How Redis Implements Strings: A Deep Dive into SDS and Encoding

Systems Internals #redis #sds #string-encoding
Jun 20

VIDEO How Redis Powers Geospatial Queries with the GeoHash Algorithm

Systems Internals #redis #geospatial-queries #geohash
Jun 20

VIDEO How Redis Implements LFU Eviction Using Morris Counter

Systems Internals #redis #lfu #eviction-strategy
Jun 14

VIDEO How Redis Implements Memory-Efficient Sets with Intset

Systems Internals #redis #intset #data-structures
Jun 13

VIDEO How Redis Internally Implements Memory Efficient Lists: Ziplist and Quicklist

Systems Internals #redis #data-structures #memory-management
May 31

VIDEO How and Why Redis Overrides Malloc: Deep Dive into jemalloc and tcmalloc

Systems Internals #redis #memory-management #jemalloc
May 30

VIDEO How Redis Caps Its Memory Usage: A Deep Dive into Redis Internals

Systems Internals #redis #memory-management #systems-internals
May 24

VIDEO Implementing Redis's Approximated LRU Algorithm: A Go Deep Dive

Systems Internals #redis #lru #eviction
May 23

VIDEO Redis's Approximated LRU Algorithm: Deep Dive into Memory-Efficient Eviction

Systems Internals #redis #lru #caching
May 22

VIDEO Implementing All Keys Random Eviction and INFO Command in Redis Internals

Systems Internals #redis #eviction-strategy #all-keys-random
May 16

VIDEO Redis Internals: Understanding Objects, Encodings, and INCR Command Implementation

Systems Internals #redis #redis-internals #data-structures
May 09

VIDEO Implementing Command Pipelining in Redis: A Deep Dive into Internals

Systems Internals #redis #pipelining #network-optimization
May 03

VIDEO Redis Key Eviction Strategies and Approximated Implementations

Systems Internals #redis #eviction #memory-management
May 02

VIDEO Implementing DEL, EXPIRE, and Auto-Cleanup in Redis Internals

Systems Internals #redis #database-internals #distributed-systems
Apr 26

VIDEO Implementing Redis GET, SET, and TTL Commands with Expiry Logic

Systems Internals #redis #key-value-store #ttl
Apr 25

VIDEO Implementing Asynchronous I/O with Epoll for a Concurrent Redis Server

Systems Internals #event-loops #epoll #asynchronous-io
Apr 19

VIDEO Event Loops Internals: How Redis Handles Concurrent Connections on a Single Thread

Systems Internals #event-loop #asynchronous-io #redis-internals
Apr 18

VIDEO Implementing Redis' PING Command: A Deep Dive into RESP and Server Internals

Systems Internals #redis #resp #go
Apr 12

VIDEO Implementing the Redis Serialization Protocol (RESP) Decoder in Go

Systems Internals #redis #resp #go-lang
Apr 11

VIDEO The Fundamentals of Wire Protocols and Redis Serialization Protocol (RESP)

Systems Internals #redis #wire-protocol #resp
Mar 19

VIDEO Low-Level Design and Data Schema Modeling of API Clients like Requestly

Systems Internals #api-client #requestly #low-level-design
Mar 13

NOTE Loop unrolling is one of those compiler tricks that feels

Systems Internals #software-engineering
Mar 05

NOTE Here's something very fundamental to how memory works in operating

Systems Internals #software-engineering
Feb 06

NOTE Anthropic spun up 16 Opus 4

Systems Internals #software-engineering
Jan 17

VIDEO Optimizing Database Memory Usage: When `malloc` Becomes a Bottleneck

Systems Internals #memory-management #malloc #tcmalloc
Jan 01

NOTE Here is something interesting about memory management in Linux: most

Systems Internals #distributed

2025

(12)

Dec 18

NOTE SQLite has about 155,800 lines of code, and its test

Systems Internals #distributed
Nov 20

NOTE Meta open-sourced Pyrefly, a Python type-checker and language server, and

Systems Internals #software-engineering
Nov 14

BLOG What are Blocking Queues and Why We Need Them

Systems Internals #systems-internals
Oct 04

NOTE Zero-copy writes make Kafka fast, but how exactly

Systems Internals #distributed
Sep 24

BLOG Why gRPC Uses HTTP2

Systems Internals #systems-internals #networking #system-design
Sep 04

BLOG Why and How Cache Locality Can Make Your Code Faster

Systems Internals #systems-internals #caching #memory-management
Sep 02

BLOG Why does DNS use both UDP and TCP

Systems Internals #systems-internals #caching #fault-tolerance
Aug 30

NOTE Python supports really long integers, practically infinite, but when it

Systems Internals #software-engineering
Jul 16

NOTE Golang is adding a new Garbage Collector called Green Tea in 1

Systems Internals #software-engineering
Jun 24

NOTE While trying to understand and optimize a nuance in Redis/Valkey,

Systems Internals #distributed
May 13

NOTE What does a Process look like in Linux Kernel source code

Systems Internals #ai
Feb 03

NOTE Go is quite memory efficient, and escape analysis is what

Systems Internals #go-internals

2024

(21)

2023

(19)

2022

(13)

2021

(13)

Jun 09

BLOG Fork Bomb

Systems Internals #systems-internals #memory-management #operating-systems
May 31

VIDEO CPython Internals: How the 'is' and 'is not' Operators Are Implemented

Systems Internals #python #cpython #systems-internals
May 24

VIDEO Under the Hood of Python's id() Function: CPython Internals and Pointer Semantics

Systems Internals #cpython #python-internals #memory-management
May 13

VIDEO How Python Compares Float and Int Objects: A Deep Dive into CPython Internals

Systems Internals #python #cpython #systems-internals
May 06

VIDEO CPython Internals: How Python Optimizes and Caches Small Integers

Systems Internals #cpython #python-internals #memory-management
Apr 28

BLOG Python Internals - Exploring Chained Comparison Operators

Systems Internals #systems-internals #python-internals
Apr 28

VIDEO How Python Implements Chained Comparison Operators

Systems Internals #python #cpython #bytecode
Apr 13

VIDEO CPython Internals: String Interning and Dictionary Optimization

Systems Internals #python #cpython #string-interning
Apr 08

VIDEO Hacking CPython Grammar: Supporting Standalone Walrus Assignments

Systems Internals #cpython #python-internals #compilers
Apr 04

VIDEO Building CPython from Source: Local Setup and Making Your First Code Change

Systems Internals #cpython #python-internals #systems-programming
Apr 03

VIDEO The Honest Python: Deep Diving into CPython Internals

Systems Internals #cpython #python-internals #memory-management
Apr 01

BLOG I Changed the Rules for the Python's Walrus Operator

Systems Internals #systems-internals #prompt-engineering #python-internals
Jan 10

BLOG Constant Folding in Python

Systems Internals #systems-internals #data-structures #go

2020

(10)

Dec 20

BLOG How Python Uses String Interning to Keep Runtime Efficient

Systems Internals #systems-internals #caching #go
Dec 13

BLOG Visualizing Recursion in Python with Just a Decorator

Systems Internals #systems-internals #algorithms #data-structures
Jun 14

BLOG Making Integers Iterable in Python

Systems Internals #systems-internals #networking #python-internals
Jun 07

BLOG Structure Composition and Emulating Inheritance in C

Systems Internals #systems-internals
May 17

BLOG How Python Handles Integers Under the Hood

Systems Internals #systems-internals #memory-management #python-internals
Apr 19

BLOG Modeling Finite State Machines with Python Coroutines

Systems Internals #systems-internals #concurrency #networking
Feb 21

BLOG Python Prompt Strings

Systems Internals #systems-internals #prompt-engineering #python-internals
Feb 07

BLOG Python's Missing Feature - Function Overloading

Systems Internals #systems-internals #python-internals
Jan 10

BLOG How Python Handles Gigantic Integers

Systems Internals #systems-internals #python-internals
Jan 03

BLOG Python Internals - I Made Addition Unpredictable

Systems Internals #systems-internals #python-internals

2016

(1)

Apr 12

BLOG HTTP - The Hard Way with Netcat

Systems Internals #systems-internals #ai-agents #networking