I confirm that i had a problem with rrdtool but with lots of interfaces (more than 10 000).
I solved my problems using: - a dedicated files system and block dev for RRD files - upgrading rrd to 1.3 (still in beta) : Using Memory Mapped IO for updates and severall performance patch - reducing block level read-a-head: blockdev --setra 16 /dev/sda - files system optimization: nodiratime, noatime, dir_index and data=writeback option (work well with reiserfs) Benchmark: Hardware: Dual P IV @2.2 Ghz, 3 Gb of Ram, 2 x 10000 rpm scsi Disk (RAID1) 900 hosts, 18700 interfaces (mostly of ethernet types so lots of 12 rrd for each interfaces), 130 poller2 running with load average < 1. (against 70 before). The database is local, I notice that it does not change anything when moving to another server.(problems are caused by php and rrdtool). Cheers, _______________ David LIMA Professional Services www.scc.com -----Message d'origine----- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Craig Small Envoyé : mardi 20 novembre 2007 00:52 À : jffnms-users@lists.sourceforge.net Objet : Re: [jffnms-users] Problems after upgrade On Wed, Nov 14, 2007 at 04:22:56PM +0000, Martin Beecroft wrote: > I spent the best part of 2 days trying to fix my installation of JFF, > and now have a monitoring solution that works again. The problem was > related to rrdtool thrashing the disk to within an inch of it's life, a > vmstat 1 10 was showing a bi value of consistently 20,000. I fixed the > problem by tweaking the readahead value on the disk with a "blockdev > --setra 64 /dev/sdb1" > > I'm not sure if anyone else has seen similar problems, or whether this > solution would help them, but I thought I'd best throw this out there in > case anyone else is struggling. Now this does sound a little familiar to someone elses problem. I think it was David; if it was can you confirm I'm sort of in the right area? I wonder if rrdtool is misbehaving? - Craig -- Craig Small GnuPG:1C1B D893 1418 2AF4 45EE 95CB C76C E5AC 12CA DFA5 http://www.enc.com.au/ csmall at : enc.com.au http://www.debian.org/ Debian GNU/Linux, software should be Free ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ jffnms-users mailing list jffnms-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jffnms-users ______________________________________________________________________ Ce message contient des informations dont le contenu est susceptible d'etre confidentiel. Il est destine au(x) destinataire(s) indique(s) exclusivement. A moins que vous ne fassiez partie de la liste des destinataires, ou que vous soyez habilite a recevoir le mail a leur place, il vous est interdit de le copier, de l'utiliser ou de devoiler son contenu a un tiers. Si vous avez recu cet email par erreur, merci de prendre contact avec l'emetteur. Les opinions exprimees dans cet e-mail sont celles de l'emetteur et ne refletent pas necessairement celles de l'entreprise. Ce e-mail peut contenir des pieces jointes dont certaines pourraient contenir des virus qui pourraient endommager votre systeme informatique. La compagnie a pris toutes dispositions afin de minimiser ce risque et decline toute responsabilite pour toute perte ou dommage resultant directement ou indirectement de l'utilisation de cet email ou de son contenu. Il vous appartient d'effectuer vos propres controles anti-virus avant d'ouvrir la ou les pieces jointes. ______________________________________________________________________ ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ jffnms-users mailing list jffnms-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jffnms-users
