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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.bhp.com.au!mel.dit.csiro.au!munnari.OZ.AU!news.ecn.uoknor.edu!paladin.american.edu!gatech!newsfeed.internetmci.com!in1.uu.net!ns2.mainstreet.net!mwang From: mwang@pandadesigns.com (Michael Wang) Newsgroups: comp.unix.bsd.bsdi.misc Subject: Problem: "No route to host" -- under moderate web traffic Date: 5 Jan 1996 06:57:08 GMT Organization: Panda Designs Lines: 24 Message-ID: <4cii44$fvc@ns2.mainstreet.net> NNTP-Posting-Host: pandadesigns.com Hi, I'm having a problem with a P90 BSDI 2.0.1 system with 64 MB RAM. The pattern of web traffic I'm handling right now is light traffic for most of the time and then for about 20 minutes once every two hours we'll get moderate to heavy traffic (3 - 7 hits second). With either Apache 1.0.0 or Netscape Comm Server 1.1, after a few minutes of serving the moderate to heavy traffic, the system seems to lose routing information -- network traffic will stop and xntpd will report "No route to host" in the /var/log/messages file. After another few minutes, the system will "recover" itself and network traffic will start flowing again. Every once in a while, during one of these "blackouts" I'll also get a "kernel: mb_map full" error in the messages file. I've tweaked various kernel parameters like MAXUSERS (80), CHILD_MAX (999), OPEN_MAX (999), SOMAXCONN (128), and SOMAXCONN_DFLT (128). Did I screw something up? Or is there another parameter I can tweak to fix this problem? -- Michael Wang mwang@pandadesigns.com