From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Bareiro Subject: Re: Swap usage with KVM Date: Mon, 2 Aug 2010 15:57:05 -0300 Message-ID: <20100802185705.GJ21963@defiant.freesoftware> References: <20100711151257.GA13279@defiant.freesoftware> <20100711191227.GD9267@defiant.freesoftware> <4C3A3C77.2010408@redhat.com> Reply-To: dbareiro@gmx.net Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="ZARJHfwaSJQLOEUz" Cc: dbareiro@gmx.net, KVM General , "hugh.dickins@tiscali.co.uk" To: Rik van Riel Return-path: Received: from mailout-de.gmx.net ([213.165.64.23]:49519 "HELO mail.gmx.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with SMTP id S1752744Ab0HBS5N (ORCPT ); Mon, 2 Aug 2010 14:57:13 -0400 Content-Disposition: inline In-Reply-To: <4C3A3C77.2010408@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: --ZARJHfwaSJQLOEUz Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi, Rik. On Sunday, 11 July 2010 17:49:43 -0400, Rik van Riel 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 >>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D+=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D >>> Aps4 | 7 GiB >>> Leela | 7 GiB >>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D+=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D >>> 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? > That depends on what is going on in the host. > > Did you notice any performance issues in the guest when you started > using swap? After the logical volume of 1 GB that I added when I found this problem (being the operating system with 2 GB), I added other 3 GB to have a little more margin, but today I got again a new alert of Nagios: =20 Swap usage WARNING [...] SWAP WARNING - 30% free (1490 MB out o= f 5052 MB) I don't see performance issue in the VMs. Marcelo Tosatti recommended me to apply the EPT patch (6316e1c8c6af6ccb55ff8564231710660608f46c). Should it be safe for use in production? Are there plans that this patch is applied on some version of Linux stable? Also it can be advisable to update to qemu-kvm 0.12.4 considering what David Weber said: http://sourceforge.net/tracker/?func=3Ddetail&atid=3D893831&aid=3D2989366&g= roup_id=3D180599 Thanks for your reply. Regards, Daniel --=20 Mi frase del d=EDa: Collaboration, n.: A literary partnership based on the false assumption that the other fellow can spell. Daniel Bareiro - GNU/Linux registered user #188.598 Proudly running Debian GNU/Linux with uptime: 15:28:17 up 23 days, 20:20, 12 users, load average: 0.16, 0.14, 0.09 --ZARJHfwaSJQLOEUz Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEARECAAYFAkxXFQEACgkQZpa/GxTmHTdd6ACfZ6KSIbDGLwApeN/IbgguWMD5 /aQAmgM+AB4UGK+npk2Ip55LMrt3HVY3 =cOnO -----END PGP SIGNATURE----- --ZARJHfwaSJQLOEUz--