On Sunday, 11 July 2010 12:12:57 -0300, Daniel Bareiro wrote: > I have an installation with Debian GNU/Linux 5.0.4 amd64 with qemu-kvm > 0.12.3 compiled with the source code obtained from the official site > of KVM and Linux 2.6.32.12 compiled from source code of kernel.org. > All this is installed on an HP Proliant DL380 G6 with two Xeon E5530 > quadcore processors and 16 GiB of RAM which has two VMs with the > following configuration of memory: > > Hostname | RAM > ===============+=============== > Aps4 | 7 GiB > Leela | 7 GiB > ===============+=============== > TOTAL | 14 GiB > > Initially the host was created with a swap partition of 1 GiB, but > today we found that the use of swap quickly began to grow > increasingly. Therefore, as a contingency, we had to hot-add a > logical volume of 1 GB of swap on the VMHost. Is 'normal' this use of > memory? > > I copy the Nagios Service Log Entries for the VMHost: > > Event Start Time Event End Time Event Duration Event/State Type Event/State > Information > --------------------------------------------------------------------------------------------------- > 06-07-2010 00:00:00 07-07-2010 00:00:00 1d 0h 0m 0s SERVICE OK (HARD) SWAP OK - > 100% free (956 MB out of 956 MB) > 07-07-2010 00:00:00 08-07-2010 00:00:00 1d 0h 0m 0s SERVICE OK (HARD) SWAP OK - > 100% free (956 MB out of 956 MB) > 08-07-2010 00:00:00 08-07-2010 16:41:43 0d 16h 41m 43s SERVICE OK (HARD) SWAP OK - > 100% free (956 MB out of 956 MB) > 09-07-2010 00:00:00 10-07-2010 00:00:00 1d 0h 0m 0s SERVICE OK (HARD) SWAP OK - > 99% free (939 MB out of 956 MB) > 10-07-2010 00:00:00 11-07-2010 00:00:00 1d 0h 0m 0s SERVICE OK (HARD) SWAP OK - > 79% free (754 MB out of 956 MB) > 11-07-2010 00:00:00 11-07-2010 07:08:17 0d 7h 8m 17s SERVICE OK (HARD) SWAP OK - > 51% free (482 MB out of 956 MB) > 11-07-2010 07:08:17 11-07-2010 10:41:07 0d 3h 32m 50s SERVICE WARNING (HARD) SWAP WARNING > - 29% free (272 MB out of 956 MB) > 11-07-2010 10:41:07 11-07-2010 10:45:57 0d 0h 4m 50s SERVICE CRITICAL (HARD) SWAP > CRITICAL - 9% free (83 MB out of 956 MB) > --------------------------------------------------------------------------------------------------- > > I'm not using qcow2 files. The /dev/cciss/c0d0p3 partition is a > physical volume that maintains the logical volumes that are used for > VM's disks. > > The Nagios Service Log Entries for VMs shows no excessive use of swap > in the window of time when the problem occurred in the VMHost: > > Aps4: > > Event Start Time Event End Time Event Duration Event/State Type Event/State > Information > --------------------------------------------------------------------------------------------------- > 06-07-2010 00:00:00 07-07-2010 00:00:00 1d 0h 0m 0s SERVICE OK (HARD) SWAP OK - > 100% free (2850 MB out of 2863 MB) > 07-07-2010 00:00:00 08-07-2010 00:00:00 1d 0h 0m 0s SERVICE OK (HARD) SWAP OK - > 98% free (2797 MB out of 2863 MB) > 08-07-2010 00:00:00 08-07-2010 16:41:43 0d 16h 41m 43s SERVICE OK (HARD) SWAP OK - > 99% free (2812 MB out of 2863 MB) > 09-07-2010 00:00:00 10-07-2010 00:00:00 1d 0h 0m 0s SERVICE OK (HARD) SWAP OK - > 98% free (2784 MB out of 2863 MB) > 10-07-2010 00:00:00 11-07-2010 00:00:00 1d 0h 0m 0s SERVICE OK (HARD) SWAP OK - > 97% free (2754 MB out of 2863 MB) > 11-07-2010 00:00:00 11-07-2010 11:53:38 0d 11h 53m 38s+ SERVICE OK (HARD) SWAP OK - > 100% free (2839 MB out of 2863 MB) > --------------------------------------------------------------------------------------------------- > > Leela: > > Event Start Time Event End Time Event Duration Event/State Type Event/State > Information > --------------------------------------------------------------------------------------------------- > 06-07-2010 00:00:00 07-07-2010 00:00:00 1d 0h 0m 0s SERVICE OK (HARD) SWAP OK - > 97% free (919 MB out of 956 MB) > 07-07-2010 00:00:00 08-07-2010 00:00:00 1d 0h 0m 0s SERVICE OK (HARD) SWAP OK - > 97% free (920 MB out of 956 MB) > 08-07-2010 00:00:00 08-07-2010 16:41:43 0d 16h 41m 43s SERVICE OK (HARD) SWAP OK - > 97% free (920 MB out of 956 MB) > 08-07-2010 17:01:36 08-07-2010 17:04:16 0d 0h 2m 40s SERVICE CRITICAL (HARD) Connection > refused by host > 08-07-2010 17:04:16 09-07-2010 00:00:00 0d 6h 55m 44s SERVICE OK (HARD) SWAP OK - > 97% free (921 MB out of 956 MB) > 09-07-2010 00:00:00 10-07-2010 00:00:00 1d 0h 0m 0s SERVICE OK (HARD) SWAP OK - > 97% free (921 MB out of 956 MB) > 10-07-2010 00:00:00 11-07-2010 00:00:00 1d 0h 0m 0s SERVICE OK (HARD) SWAP OK - > 97% free (921 MB out of 956 MB) > 11-07-2010 00:00:00 11-07-2010 11:58:29 0d 11h 58m 29s+ SERVICE OK (HARD) SWAP OK - > 97% free (921 MB out of 956 MB) > --------------------------------------------------------------------------------------------------- > > > > Unfortunately I could not take much more data because we had to act > quickly, but if you need any additional information, please feel free to > ask. Has anyone experienced something like this? Avi? I remember late last year there was a regression in Linux swapping and Rik and Hugh were working on it. Are you aware of any? Thanks in advance for your reply. Regards, Daniel -- Fingerprint: BFB3 08D6 B4D1 31B2 72B9 29CE 6696 BF1B 14E6 1D37 Powered by Debian GNU/Linux Lenny - Linux user #188.598
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