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: February 2026
In February, we experienced six incidents that resulted in degraded performance across GitHub services.
Addressing GitHub’s recent availability issues
GitHub recently experienced several availability incidents. We understand the impact these outages have on our customers and are sharing details on the stabilization work we’re prioritizing right now.
GitHub availability report: January 2026
In January, we experienced two incidents that resulted in degraded performance across GitHub services.