![]() ![]() Then when you do a search, it will exclude these questions from the results. tags that you don’t want to see questions for. These exclusions are configurable and allow you to set “Ignored Tags”, i.e. What is he talking about here? Well any time you do a tag search, after the actual search has been done per-user exclusions can then be applied. But the real Tag Engine does much more than that, for instance: a basic search for all the questions that contain a given tag, along with multiple sort orders (by score, view count, etc). In part 1, I only really covered the simple things, i.e. It’s a nice way of being able to cope with surges in demand or busy times of the day. As you can see they run the Tag Engine on some pretty powerful servers, but only have a peak CPU usage of 10%, which means there’s plenty of overhead available. Since the first part was published, Stack Overflow published a nice performance report, giving some more stats on the Tag Engine Servers. ![]() This is the long-delayed part 2 of a mini-series looking at what it might take to build the Stack Overflow Tag Engine, if you haven’t read part 1, I recommend reading it first. There’s also a video of my NDC London 2014 talk “Performance is a Feature!”. I’ve added a Resources and Speaking page to my site, check them out if you want to learn more. ![]()
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