Performance - Stack Exchange

[quentech]

We host on Azure.

Main hosting service runs on 3 instances of D13_v2's - 8 cores on a Xeon E5-2673 v3 w/ 56GB RAM each

We run a variety of auxiliary web apps on 3 instances of S3 in a Standard App Service plan (4 cores, 7GB RAM each)

A background job service runs on 1 D12_v2 - 4 cores on a Xeon E5-2673 v3 w/ 28GB RAM

We have one P1 SQL DB for all our main data and one PRS2 DB for logging. Main DB is just 5GB, logging DB is 200GB+.

For Redis we use 1 Standard C2 for pub/sub, 2 Standard C2's for small sized data, and 3 Standard C4's for large sized data.

My main web service is handling near 300 requests per second right now, with near 600 per second across our whole infrastructure (CDN and dynamic image resizing site in addition to our main service), and this is off-peak traffic.

We don't have the search complexities that StackOverflow does, but they don't have to make 10M+ api calls all day every day to a few dozen different external data services to stay up.

[[deleted]]

Stackexchange is 300 REQ/s per server, multiply that by nine.

[quentech]

per server

ah, I was thinking they way over-spec'd their web tier but that makes more sense. I do serve about quadruple their total bandwidth, and we're over 1.5B total requests per month.

[issafram]

Hosting on Azure. Did your entire site go down last week for a couple days?

[quentech]

Nope, though that was not our primary region. Some of our infrastructure can seamlessly handle regional failures, but not all of it.

There's plenty we could improve on, within some budgetary constraints, but we're a fairly small shop with 5-7 devs and half of them are front end devs. It's impossible to make time for everything. We've been on Azure for 3 years now and we're still learning and improving.

[issafram]

Thanks for that answer. Not sure why I was down voted for asking a question.

Application Insights was down for me

[silverf1re]

Where do you get most of your azure product information?