I have been troubleshooting a performance issue with Sage 300 ERP 2018 (Bulid 0). It is exacerbated when more users are on the system which for us is only about 10 people. If one or two are on then its tolerable. Nothing has really changed in the last couple of months that I can correlate to this recent change in the last couple of days.  

I do not believe it is a database bottleneck as I have issues just navigating the GUI application e.g. scrolling through menus and moving the application window around. This happens running the app on an end user PC or even the application server hosting Sage companies ( which is separate from the database server)

I started to use procmon to see what the application was doing an to my surprise while it is idle i.e. not waiting on anything from me to do. I see it gerateing a lot of activity for two files in particular:

C:\Sage\Sage 300 ERP\Data\SITE\config.ism

C:\Sage\Sage 300 ERP\Data\Entitlements.xml

In the case of config.ism it is trying to lock, unlock and read the file several times a second. With Entitlements it is reading it once every 2 seconds or so. I monitored this from two different systems and saw the same behavior. 

Is this typical behavior? Does not seem likely. I could easily see this being a reason that the application has GUI delays if its this busy reading those files.