# Base RDS session-host sizing on the users’ actual workload mix

> Which workload and concurrency assumptions should an RDS session-host sizing estimate state?

- Canonical URL: https://update.dsesecurity.com/updates/dse-20260908-127-base-rds-session-host-sizing-on-the-users-actual-workload-mix/
- Publisher: Detection Systems & Engineering (DSE Security)
- Author: DSE Security Editorial Team
- Published: 2026-09-08T18:15:04+00:00
- Modified: 2026-09-08T18:23:27+00:00
- Last reviewed by DSE: 2026-09-08
- Resource type: Guide
- DSE priority: Information
- Topics: IT, Networks & Infrastructure
- Reading time: 1 minutes

## What you need to know

Which workload and concurrency assumptions should an RDS session-host sizing estimate state?

## Potentially affected

Administrators sizing Remote Desktop Services or Azure Virtual Desktop session hosts.

## DSE recommendation

Build a sizing worksheet with named applications, representative user activity, peak concurrency, and planned growth.

## Article

## Source facts

Microsoft describes session-host capacity planning as estimating required resources and users per host from current and future workload demand. The workload mix affects density: light data-entry work and demanding 3D applications can support different user counts on the same hardware. The guidance distinguishes a single-session host, with one signed-in user, from a multi-session host serving several users concurrently. Multi-session deployment allows more than one signed-in user on the host VM. [Microsoft documentation](https://learn.microsoft.com/en-us/windows-server/remote/remote-desktop-services/session-host-virtual-machine-sizing-guidelines).

## Applicability

Identify the deployment type, application mix, concurrency pattern, user groups, and service targets. Review the source’s sizing guidance for the relevant workload class rather than treating one example density as universal.

## DSE recommendation

Build a sizing worksheet with named applications, representative user activity, peak concurrency, and planned growth. Ask the application owners to approve the workload model. Choose a pilot host and define the user experience measures that will determine whether its proposed density is acceptable.

## Verification

Run representative sessions together and measure the agreed experience and resource indicators during realistic activity. Include login periods and a demanding application task. Record the tested user count and workload mix with the results, and revise the estimate when those assumptions change.

## Official references

[Microsoft Learn: Session Host Virtual Machine Sizing Guidelines for Remote Desktop](https://learn.microsoft.com/en-us/windows-server/remote/remote-desktop-services/session-host-virtual-machine-sizing-guidelines). Source reviewed September 8, 2026.

## Primary reference

- Name: Session Host Virtual Machine Sizing Guidelines for Remote Desktop
- Authority: Microsoft Learn
- URL: https://learn.microsoft.com/en-us/windows-server/remote/remote-desktop-services/session-host-virtual-machine-sizing-guidelines
- Source publication date: Not stated by the source

## Citation and use

Preferred citation: “Base RDS session-host sizing on the users’ actual workload mix,” DSE Security, https://update.dsesecurity.com/updates/dse-20260908-127-base-rds-session-host-sizing-on-the-users-actual-workload-mix/
Publishing principles: https://update.dsesecurity.com/updates/dse-updates-editorial-methodology/
Usage and citation policy: https://update.dsesecurity.com/usage/
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