All fairly calm at the moment. 77% mobile already...
As always happens the number of users drops as the announcement starts...
Then explodes in about 20 seconds.... wow! Thats a huge jump!
256K and growing...
Announcement ends... does it go up or down? Very much up! 384K and growing.
45K to 610K in 10 mins. I'm so glad we have an infrastructure that scales quickly! Still growing. 85% mobile!
Real time analytics just stopped. Topped out at 769K! I think we were heading for a million....
Well that's a real shame.
It's under these conditions that #webperf really really matters. 45K to 769K in 11 mins.. If you are serving too many non-critical (& unoptimised) assets, your users and your servers are going to have a bad time!
CDN was reporting 46,000 requests per second with 0 errors per second. 5.1 Gbps bandwidth out at the peak.
Spoke too soon! Now up to 88,000 requests per second 😱
The spike(s) from CDN data is incredible. Note the initial spike at the start, drops during the announcement then an even bigger spike once it finishes! Crazy amount of traffic.
Could be a contender for busiest ever period on GOV.UK...
99% cache hit rate at the CDN. Fantastic work @fastly!
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Great to see some fantastic #webperf work happening on GOV.UK at the moment. The team have been gradually removing the shard domain for critical assets, and it's made quite a difference! Images from Chrome on a 3G connection and S4 on 3G. 1/4
Considering where we were at the start of Feb: HTTP/1.1, SRI, shard domain, ~13 TCP connections. Now down to just 1 TCP connection in many cases. 2/4
And we can finally make the most the features H2 has to offer. Serving all assets off a single domain allows:
• all assets to use a connection that is up to speed (TCP slow start)
• prioritisation can happen across all assets
• no more h2 connection coalescing required
3/4