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How Does a Database Let Everyone Read and Write at Once?

How Does a Database Let Everyone Read and Write at Once?

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19 min read
Our test runner had one core and the race needed two

Our test runner had one core and the race needed two

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2 min read
From Thread Pools to Virtual Threads: How Spring Boot on Java 21 Scales in Production

From Thread Pools to Virtual Threads: How Spring Boot on Java 21 Scales in Production

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4 min read
Java Concurrency LLD: Build a Custom BlockingQueue From Scratch

Java Concurrency LLD: Build a Custom BlockingQueue From Scratch

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2 min read
Stop Slamming Downstream Services: Singleflight Request Coalescing with Java Virtual Threads

Stop Slamming Downstream Services: Singleflight Request Coalescing with Java Virtual Threads

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2 min read
Function coloring is real and pretending context propagation isn't infection

Function coloring is real and pretending context propagation isn't infection

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3 min read
Why Your Counter Shows 847 Instead of 1000 (Race Conditions, Explained)

Why Your Counter Shows 847 Instead of 1000 (Race Conditions, Explained)

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1 min read
credits_remaining -= 1 is a race condition

credits_remaining -= 1 is a race condition

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5 min read
Java Memory Model: How Multithreading Changes the Rules

Java Memory Model: How Multithreading Changes the Rules

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6 min read
Idempotent, budget-bounded AI queries on a single SQLite writer

Idempotent, budget-bounded AI queries on a single SQLite writer

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5 min read
Java Concurrency: Threads

Java Concurrency: Threads

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8 min read
Case Study: The Thread Pool Passed 64/64 Tasks. ThreadSanitizer Found the Race in the Destructor

Case Study: The Thread Pool Passed 64/64 Tasks. ThreadSanitizer Found the Race in the Destructor

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5 min read
A Small Fintech Challenge, and Why I Let Postgres Hold the Money

A Small Fintech Challenge, and Why I Let Postgres Hold the Money

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4 min read
The Crash That Only Happened in Production

The Crash That Only Happened in Production

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3 min read
Java 21 Virtual Threads: Is the Thread Pool Era Over?

Java 21 Virtual Threads: Is the Thread Pool Era Over?

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1 min read
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