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ESX Memory Estimation


barry99705
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How do you estimate how much memory you need for an Esx setup? Right now we have a Dell 2950 with 8Gb of ram. At the moment there's only one server 2003 vm running as a file server. Eventually we are going to have a few more servers running, that will be running back end services for pre-press imaging software support Photoshop, Illustrator, and Solid Works software plugins mostly). Right now the guys have a bunch of old ass computers and servers that were cobbled together to be "good enough" for what they do. The highest end of them only has 2Gb of ram and occasionally runs out. They are regularly pushing around multi-gig files, so I was going to configure the vm servers with 4Gb of ram. I know esx will make the servers only use what they need, and they'll probably never max out their ram at the same time, but knowing these guys it will happen. So should I configure the host machine to have the maximum of what the images are configured with? Does any of this make sense?

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My main advice would be to make sure you can upgrade the RAM at a later date. Then you need to spend a decent amount of time monitoring the VM's and seeing how much memory is used and adjusting it accordingly. ESX can over commit but its slow.

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My main advice would be to make sure you can upgrade the RAM at a later date. Then you need to spend a decent amount of time monitoring the VM's and seeing how much memory is used and adjusting it accordingly. ESX can over commit but its slow.

Yea, I think that's what we're going to do. Looking at adding an additional 8Gb of ram now, just in case, with the ability to add some more later. We're bringing in other locations file servers as well, so these have to work now. We'll add the support servers one at a time and adjust accordingly.

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