Existance co VM / memory settings
I have a question about coexisting VMs and memory management. I try VMWare server (2.0.1) on a Windows 2003 host. I have three virtual computers in place, (A) Suse Linux with Nagios software, (B) Windows 2000 with Windows 2003 (C) and the BTS without anything installed (so far). The server has 4 GB of memory assigned to the virtual machines A - 1, B - 128 MB, GB, C - 1 GB. All these virtual machines are idle and only in the test phase. I got the value C use 3 GB, and 2 GB of memory, but in both cases when VM C starts to work (start, run installations/updates) the host and all virtual machines would be grinds to a State not responding for several minutes. When this happens, the gel to the top is due to the swap/paging memory. My question is what should I be looking at and what guidelines should be followed to make the most of the system's memory without causing this problem. With the current settings of memory, when only turn on/off any machine itself, or when you feed on A and B together no frost until occurs.
I hope I got the details, feel free to ask for clarification. Thank you for helping me to start learning of VMWare.
I start low, in terms of allocation of memory for virtual machines and then increase as needed, i.e. If VMS are weakening memory as they see it from inside the virtual machine itself in the guest OS. There is no hard and fast rule because all the workloads are different. Also use only one procesor VMs unless absolutely necessary. Because you run three different OS, there will be little memory savings between them compared to if you all had the same OS. Note also the setting in the web console as to whether VMs must be performed in memory of the host available - see attached screen shot. If the memory is a bottleneck, try and reduce what you run both host and guests (or add memory). Make sure also that your discs are not the bottleneck, as is often the case on my production servers.
Guy Leech
VMware vExpert 2009
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