# How much cost does reading a tag have?

**URL:** <https://forum.inductiveautomation.com/t/how-much-cost-does-reading-a-tag-have/108757>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [July 22, 2025, 11:29am UTC](https://forum.inductiveautomation.com/t/how-much-cost-does-reading-a-tag-have/108757 "2025-07-22T11:29:35Z")\
**Posts on this page:** 1\
**Showing post:** 10

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [July 22, 2025, 1:21pm UTC](https://forum.inductiveautomation.com/t/how-much-cost-does-reading-a-tag-have/108757/10 "2025-07-22T13:21:12Z")

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> [@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](https://forum.inductiveautomation.com/t/microsoft-virtual-machine-suggestion/86787/5):
>
> 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…

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