We are currently testing an upgrade from CF11 to CF2018 for my company's intranet. To give you an idea how long this site has been running, our first version of CF was 3.1! It is still using application.cfm, and there is code from 1998, when I started writing this thing. Yes, 21 years -- I'm astonished, too. It is a hodgepodge of all kinds of older frameworks, too, including Fusebox.
Anyway, we're running Win 2012 VM connected to a SQL 2016 farm. Everything looked OK initially, but in the Week I've been testing, the server has come to a slowdown once (a page took more than 5 seconds to run, something that usually takes 100ms, no DB involvement), and another time, the server came to a grinding halt. The only way I could restart CF App service was by connecting to the server with another server via Services, because doing it via Remote Desktop was so slow.
Now keep in mind -- it's just me testing. This is a site that doesn't have a ton of users, but still, having 5 concurrent connections is normal and there are upwards of 200-400 users hitting this thing every day.
I have FusionReactor running on this thing now, so the next time a lockup happens, I will be able to take a closer look, but what do you think is the best way I can test this? Our site is mostly transactional, users going and filling out forms to put internal orders through. We also connect to XML web services and REST services; we also provide REST services, too. Obviously there's no way to completely replicate a production server's requests onto a test server, but I need to do more thorough testing. Any advice would be hugely appreciated.
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