Hi there,
a) Page 32 of this document mentions that 250 services (windows service instances) on ArcGIS Enterprise servers have an absolute upper limit, after which, in my experience, the may platform become unstable. Do you have experience by circumventing the Windows service instances constraint by editing the server registry? Would be interesting to hear how ArcGIS server performance worked after the change with both published and hosted services? And what kind of server capacity was used?
We are planning a future Portal for ArcGIS Enterprise 10.8.1 environment deployment for a large number of end users, and with this prospect we will have to exceed the limit of 250 Windows service instances due to the diverse workflows of business needs. I understand that the content of the services, and not just the number, will have a great impact on performance, it would be interesting to hear from others.
Here is an abstract on page 32:
'Dispelling old myths