[noajshu]

I noticed that for 1-3 minutes after the outage began (I was between pageloads and noticed the outage immediately) the 503 page did not load after waiting >30s. Afterwards the 503 page loads in < 1s. I wonder what failover configuration Github uses, such that this delay would occur.

[misterbowfinger]

It's probably just the CDN caching the 503 page.

[noajshu]

Do you mean that the CDN takes a few minutes to "kick in" and start serving that page?