Facebook’s memcached on GitHub
Facebook just released their memcached fork. The enhancements are explained in this note. Since we’ve made all these changes, we have been able to scale memcached to handle 200,000 UDP…
Facebook just released their memcached fork. The enhancements are explained in this note.
Since we’ve made all these changes, we have been able to scale memcached to handle 200,000 UDP requests per second with an average latency of 173 microseconds. The total throughput achieved is 300,000 UDP requests/s, but the latency at that request rate is too high to be useful in our system. This is an amazing increase from 50,000 UDP requests/s using the stock version of Linux and memcached.
Written by
Related posts

GitHub Availability Report: September 2025
In September, we experienced three incidents that resulted in degraded performance across GitHub services.

The developer role is evolving. Here’s how to stay ahead.
AI is changing how software gets built. Explore the skills you need to keep up and stand out.

How GitHub protects developers from copyright enforcement overreach
Why the U.S. Supreme Court case Cox v. Sony matters for developers and sharing updates to our Transparency Center and Acceptable Use Policies.