How much memory do I need to have 20 virtual devices?
| Parameter | Recommended Value | |-----------|-------------------| | Total Host RAM | 32 GB – 64 GB | | RAM per Device | 1 GB – 1.5 GB (minimum) | | CPU | 8 – 12 cores (preferably with Hyper-Threading) | | Disk Space | 200 GB – 300 GB (SSD) for images and emulator data |
Quick RAM Calculation
1. Minimum Allocation: 1 GB per device
- 20 × 1 GB = 20 GB
- + ≈ 6-8 GB for Windows 10 and system processes → ≈ 26-28 GB
2. Comfortable Allocation: 1.5 GB per device
- 20 × 1.5 GB = 30 GB
- + ≈ 6-8 GB for OS → ≈ 36-38 GB
Other Resources
- CPU: Each emulator consumes at least one CPU thread. With 20 instances, 8-12 cores (16-24 threads) allow the scheduler to distribute the load without saturating the host.
- Storage: Each device occupies between 2 GB – 4 GB (Android system + apps). With 20 devices, reserve ≈ 80-120 GB only for virtual disks; a 200 GB – 300 GB SSD provides sufficient space and speed.
- GPU: A graphics card with OpenGL 3.0+ support and sufficient VRAM (4 GB or more) improves emulator graphics performance, although it is not strictly necessary for tests that do not require intense UI.
Practical Tips
1. Adjust RAM per Device: In each emulator's configuration, assign only the amount you actually need (1 GB – 1.5 GB).
2. Disable unnecessary features: For example, disable the camera or sensors if you won't use them; this reduces RAM/CPU consumption.
3. Monitor resources: Use the Task Manager or tools like htop to ensure you don't reach 90% usage of RAM or CPU.
4. Consider the cloud: If your hardware doesn't meet these requirements, Genymotion SaaS allows you to scale the number of devices without investing in local infrastructure.
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In summary: for 20 virtual devices, aim for 32 GB – 64 GB of RAM, 8 – 12 CPU cores, and a 200 GB SSD. With this configuration, you'll have sufficient space to run emulators stably and without degrading performance.