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# citrix-vads
Slackbot
08/10/2022, 8:21 PMThis message was deleted.
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Kees Baggerman
08/10/2022, 8:39 PMI never was a fan of that rule anyway, Moore’s law is an actual thing you know.
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Lakatta
08/10/2022, 8:51 PMthank you
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Nick Panaccio
08/10/2022, 9:37 PMThere's was an old Synergy session that went into this, showing another method for figuring out scalability. Citrix removed it from YouTube for some damn reason, but I basically created a spreadsheet using their methodology. Worked fine for us, but I'm not sure how well any of this works short of using something like LoginVSI and actually testing your workloads.
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Lakatta
08/10/2022, 9:38 PMoh
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Rob Zylowski
08/10/2022, 10:36 PMThe only way to really know is to pilot with real users.
đź‘Ť 2
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Lakatta
08/10/2022, 10:41 PMya, true.
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Mike Streetz (O_P)
08/11/2022, 4:03 PMIt’s difficult to tell but what I’m finding lately is that if you give the users a browser you will hard pressed to get more than 15 on any server configuration, no matter the specs. The magic number seems to be around 10.
Mike Streetz (O_P)
08/11/2022, 4:04 PMfor 2019/Win10 MU
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Lakatta
08/11/2022, 4:05 PMInteresting, really interesting. Thanks Mike!
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Mike Streetz (O_P)
08/11/2022, 4:06 PMwe went up to 16 cores and 56GB of RAM in Azure and couldn’t get more than 14 users on without someone complaining of slowness
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Lakatta
08/11/2022, 4:06 PMholy crap
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Mike Streetz (O_P)
08/11/2022, 4:07 PMThat’s a full desktop though, apps are a little different
Mike Streetz (O_P)
08/11/2022, 4:07 PMit basically comes down to if you allow chrome/edge or not, and there’s not many places that don’t allow a browser
Mike Streetz (O_P)
08/11/2022, 4:08 PMif you get super into optimizing edge you can probably fit more on, but if you’re stuck with Chrome, then you’re capped at around that 15 number
Mike Streetz (O_P)
08/11/2022, 4:09 PMI keep trying to throw more resources at it but keep coming back to that number, even with vGPU
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Lakatta
08/11/2022, 4:09 PMWow
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Mike Streetz (O_P)
08/11/2022, 4:10 PMyeah, so it’s probably better to scale out. If you can keep 10 users happy with 5 cores and 32GB of RAM just build more VMs
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Paul Brown
08/11/2022, 4:11 PMThis is why we flipped from Hosted server desktop to Win10 VMs. All it takes is one user to hose a box for everyone else.
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Lakatta
08/11/2022, 4:11 PMWe changed our student lab machines to virtual desktops.
So far only 100 desktops at 16gigs ram/4 processors. I can push it to 140 (licensed for 150)
When updating these student lab machines, we can handle a boot storm of 20 at a time.
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Mike Streetz (O_P)
08/11/2022, 4:11 PMThat’s been my experience over the last few years anyway, the days of getting 40 users onto a server OS are long gone
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Lakatta
08/11/2022, 4:13 PMTrue.
Lakatta
08/11/2022, 4:13 PMThis is all great information. thank you Mike.
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Mike Streetz (O_P)
08/11/2022, 4:16 PMMike Streetz (O_P)
08/11/2022, 4:17 PMit all depends on where you are hardware constrained and how intensive your workloads are, if it’s CPU keep an eye on CPU ready, anything 5 or over is going to be rough. Same thing for disk and disk queues
Mike Streetz (O_P)
08/11/2022, 4:18 PMdisk latency is a killer if you’re doing a vhd profile solution
Mike Streetz (O_P)
08/11/2022, 4:19 PMthe sizing calculators from citrix I have not found to be of much use for years, they are wildly optimistic
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Lakatta
08/11/2022, 4:24 PMLOL yes those calculations are.
So far these are only student lab machines with stat software and arcgis (no 3d cards yet). Staff we will be using liquidware for profile management.
That link is something that will help me immensely