We've recently made the full jump to Umbraco 12 from Umbraco 8 and we're finding that on the server with production settings that the backoffice is really slow to load after not being accessed for a while (the front end is fast as ever and once it loads the backoffice that's just as fast for a while, too). Has anyone else seen this and know of some possible updates to mitigate it?

Hello @ahwm , I faced this issue before a few days, In my situation it happens because the Packages that I have , After upgrade my application from 12 to 13 it was too much slow but I fix it by remove unwanted packages and update the another packages, after that ( Clean & Restore ). Some packages I removed them and I re-installed them. Maybe this issue happens for some reason but in my case it was like that .

Thank you. That put me on the right track. I tried changing

useInMemoryCache

to

false

(which at first didn't change much) but then I tried disabling a custom package we have that lets us log in and change the password weekly and that seemed to fix it on the server. It runs fine on local though so that's interesting. I'll do some additional debugging and see if I can figure out how to fix that. Thanks!