[CentOS] Re: Not seeing all memory in CentOS 5.1 x86_64
Am Dienstag, den 10.06.2008, 22:54 -0700 schrieb John R Pierce: Ruslan Sivak wrote: John R Pierce wrote: whats cat /proc/meminfo say? # cat /proc/meminfo MemTotal: 6104064 kB ... HighTotal: 0 kB HighFree:0 kB LowTotal: 6104064 kB LowFree: 1992580 kB ... Linux version 2.6.18-53.1.21.el5xen ([EMAIL PROTECTED]) (gcc version 4.1.2 20070626 (Red Hat 4.1.2-14)) #1 SMP Tue May 20 10:03:27 EDT 2008 BIOS-provided physical RAM map: Xen: - 0001ef8fb000 (usable) that range is about 7.9 GiBytes, so the rest is getting lost somewhere. I'm unfamiliar with Xens innards.. How many VMs are running and how much memory do they consume? This memory is not shown in DOM0 any more. The total memory should be visible within xentop. wkr Henry ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Re: Not seeing all memory in CentOS 5.1 x86_64
On Wed, Jun 11, 2008 at 9:04 AM, henry ritzlmayr [EMAIL PROTECTED] wrote: How many VMs are running and how much memory do they consume? This memory is not shown in DOM0 any more. The total memory should be visible within xentop. Or with : # virsh nodeinfo CPU model: x86_64 CPU(s): 4 CPU frequency: 2333 MHz CPU socket(s): 2 Core(s) per socket: 2 Thread(s) per core: 1 NUMA cell(s):1 Memory size: 10484736 kB Regards, Tim -- Tim Verhoeven - [EMAIL PROTECTED] - 0479 / 88 11 83 Hoping the problem magically goes away by ignoring it is the microsoft approach to programming and should never be allowed. (Linus Torvalds) ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Re: Not seeing all memory in CentOS 5.1 x86_64
Tim Verhoeven wrote: On Wed, Jun 11, 2008 at 9:04 AM, henry ritzlmayr [EMAIL PROTECTED] wrote: How many VMs are running and how much memory do they consume? This memory is not shown in DOM0 any more. The total memory should be visible within xentop. Or with : # virsh nodeinfo CPU model: x86_64 CPU(s): 4 CPU frequency: 2333 MHz CPU socket(s): 2 Core(s) per socket: 2 Thread(s) per core: 1 NUMA cell(s):1 Memory size: 10484736 kB Regards, Tim While it seems to make sense (and both xentop and virsh nodeinfo) show the right amount of memory, even when I shut down one of the VM's, free and top still think I only have 6GB of ram. Russ ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Re: Not seeing all memory in CentOS 5.1 x86_64
On Wed, Jun 11, 2008 at 4:46 PM, Ruslan Sivak [EMAIL PROTECTED] wrote: While it seems to make sense (and both xentop and virsh nodeinfo) show the right amount of memory, even when I shut down one of the VM's, free and top still think I only have 6GB of ram. That is normal, the memory that was used by VM's is not automatically returned to the dom0 and therefore won't show when running free and top. Regards, Tim -- Tim Verhoeven - [EMAIL PROTECTED] - 0479 / 88 11 83 Hoping the problem magically goes away by ignoring it is the microsoft approach to programming and should never be allowed. (Linus Torvalds) ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Re: Not seeing all memory in CentOS 5.1 x86_64
Tim Verhoeven wrote: On Wed, Jun 11, 2008 at 4:46 PM, Ruslan Sivak [EMAIL PROTECTED] wrote: While it seems to make sense (and both xentop and virsh nodeinfo) show the right amount of memory, even when I shut down one of the VM's, free and top still think I only have 6GB of ram. That is normal, the memory that was used by VM's is not automatically returned to the dom0 and therefore won't show when running free and top. Regards, Tim I guess it has something to do with the ballooning driver for Dom0. It looks like I just tried to allocation too much memory to DomU and the box went down hard. I think there's a setting in xen to the min amount of memory to go down to, but I'm not sure why Dom0 is using 600mb of RAM. Is there a mini installation of CentOS that I can do that would use less RAM? I've already unchecked all the boxes when installing CentOS. I would like Dom0 to be as small as possible, both due to RAM usage and from a security perspective. Russ ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Re: Not seeing all memory in CentOS 5.1 x86_64
MHR wrote: On Wed, Jun 11, 2008 at 8:36 AM, Ruslan Sivak [EMAIL PROTECTED] wrote: I guess it has something to do with the ballooning driver for Dom0. It looks like I just tried to allocation too much memory to DomU and the box went down hard. I think there's a setting in xen to the min amount of memory to go down to, but I'm not sure why Dom0 is using 600mb of RAM. Is there a mini installation of CentOS that I can do that would use less RAM? I've already unchecked all the boxes when installing CentOS. I would like Dom0 to be as small as possible, both due to RAM usage and from a security perspective. I've not familiarized myself with xen yet, but have you considered VMware Server? I haven't had any serious problems with it, and none at all since v1.0.5 came out (1.0.6 is the current one). Works nicely, stays within its memory allocation, and top et al work as you'd expect them to. HTH mhr ___ Are you talking about VMware Server 1? Isn't there an issue with only being able to allocate 3.4GB of ram or something to that point? I guess it wouldn't be an issue since I only have 8GB of ram on this box, unless I wanted to allocate a lot of ram to a single process. I, too, like VMWare Server 1 and have been using it in production under windows. Does it support paravirtualization at all? I treid, VMWare server 2 beta, and they made it pretty much unusable. The web interface isn't that great, and there is no way to tell it to use an LVM volume. Hopefully they will improve it in the future. It's too bad that you can't use Xen and VMWare on the same box. I could've ran Windows stuff in VMWare and Linux stuff paravirtualized in Xen. Russ ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Re: Not seeing all memory in CentOS 5.1 x86_64
On Wed, Jun 11, 2008 at 10:29 AM, Ruslan Sivak [EMAIL PROTECTED] wrote: Are you talking about VMware Server 1? Yes. Isn't there an issue with only being able to allocate 3.4GB of ram or something to that point? I guess it wouldn't be an issue since I only have 8GB of ram on this box, unless I wanted to allocate a lot of ram to a single process. Yes, VMS1 only supports up to 3.6GB or memory. I, too, like VMWare Server 1 and have been using it in production under windows. Does it support paravirtualization at all? Not according to VMWare - that's up for v2, whenever that comes out. mhr ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
