Samuel’s Substack
Samuel OwolabiMy personal Substack
| Platform |  | Pricing | Only free issues | Publishes | Weekly |
|---|---|---|---|---|---|
| Issues | 10 | Subscribers | Read | samowolabi.substack.com |
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Latest Issues
Recent posts by this newsletter. Browse the email archive.
Pessimistic vs Optimistic Locking in PostgreSQL
What happens when two users try to buy the last item at exactly the same time? Not one after the other, simultaneously. Same millisecond, same row, same database. If you don’t have a clear answer to that question, your system probably has a...
Short Polling, Long Polling vs. SSE vs. WebSockets: Tradeoffs, Use Cases, and How to Choose
Most developers have implemented some form of real-time communication between the server and the client. Yet we often lack the proper terminology for the underlying architectural patterns we employ.
Caching in Real Systems: What to Cache, When to Cache, and When Not To
There is a famous quote in software engineering that gets repeated so often it has become a bit of a cliché:
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Authors
The writers behind this newsletter.
Software Engineer | AWS Certified | I teach System Designs
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