How much cost does reading a tag have?

[pturmel]

@danielps1818

We have about 70 perspective views working at the same time.

Do you mean Perspective users/client sessions? Perhaps you should read the Ignition sizing guide and this addenda:

Microsoft Virtual Machine Suggestion

After going through that sizing guide, I'd add another vCPU for every 4-8 Perspective clients (of pretty much any kind), a GB of gateway RAM for every 4-8 light-duty Perspective clients, and 2-4GB of gateway RAM for every heavy-duty Perspective client. "Light duty" would be single page Perspective apps running in Workstation, or Mobile, or single-tab browser sessions, displaying dashboards with real-time tags, up to an hour (-ish) of real-time trends, and pre-computed statistics for longer time…