I came here just to open the same discussion… This is a standby web application. 2 users doing minimal user tests once in a while. The drop was indeed a server restart. No scheduled jobs or any code difference from 1.8.3.
I posted this in the past: Memory Utilization is running high - #4 by paulishca It looks like those “saw teeth” are now adding up like … a desire which is not being released and keeps accumulating in various parts of the body … if I may …
