You can oversubscribe memory. I highly suggest not doing this. You can and probably will have performance degradation with overcommiting memory if your servers start feeling some pressure. However, if you give it 10gb and it only ever uses 3, you probably won't see a performance hit. Which leads me to; why give it that much if it doesn't need it. I always start low with memory. I run virtual Windows Server 2008 R2 (x64) with 1 to 2gb of ram. If there is a need to increase it, i do. It's virtual ,so who cares. You can add almost any resource as needed whenever you need it. I also suggest starting with 1 vCPU. That's what i've used since I started with ESX 2.x. These are also the recommendations of my VMware trainer when I got my VCP3 and from VMWare support when troubleshooting performance issues with servers.
________________________________________ From: tech-geeks-boun...@tech-geeks.org [tech-geeks-boun...@tech-geeks.org] On Behalf Of JimHays [hay...@sages.us] Sent: Wednesday, October 13, 2010 9:44 AM To: Tech-Geeks Mailing List Subject: Re: [tech-geeks] ESXi "Expert" needed Thank you. Over subscribe is the term that I was needing. I reserve the right to ask more stupid questions as we embark on this wonderful journey........ It a great day to be a Tech Geek. McKay, Curtis wrote: > To my knowledge, yes, you can over subscribe hardware with ESXi. > > Curtis McKay > Network Administrator > Belleville Township High School District 201 > cmc...@bths201.org > > > -----Original Message----- > From: tech-geeks-boun...@tech-geeks.org > [mailto:tech-geeks-boun...@tech-geeks.org] On Behalf Of JimHays > Sent: Wednesday, October 13, 2010 9:39 AM > To: Tech-Geeks Mailing List > Subject: Re: [tech-geeks] ESXi "Expert" needed > > OK, Bob, since you are obviously ahead of me on this superhighway that > is virtualization I get to ask you a couple questions. > > With ESXi do I need to "divide the hardware" or can I play "first come, > first served"? > > In other words: > > I have a new server with 12 GB RAM. I will dedicate 2 GB RAM to the > management software. That leaves 10 GB RAM for my servers. On this > box, I will have 2 virtual servers - one with Windows and one with > Linux. Can I assign 3 GB to the Linux server and assign 10 GB to the > Windows server (first come, first served) or must I divide with 3 GB to > Linux and 7 GB to Windows (divide)? > > I know that dividing has some major advantages but so does "first come" > and we are carefully considering each. I just need to know if "first > come" is even possible with ESXi. > > > TIA. > > > Bob Schmidt wrote: > >> I see you in my rear view mirror. Stop tailgating! :) >> >> >>>>> JimHays <hay...@sages.us> 10/13/2010 9:23 AM >>> >>>>> >> OK. So who's the ESXi expert on this list? I need to bounce some ideas >> off someone as we are about to embark on the virtualization road. >> >> | Subscription info at http://www.tech-geeks.org | >> ------------------------------------------------------------------------ >> >> | Subscription info at http://www.tech-geeks.org | >> > > | Subscription info at http://www.tech-geeks.org | > | Subscription info at http://www.tech-geeks.org | > | Subscription info at http://www.tech-geeks.org | | Subscription info at http://www.tech-geeks.org |
