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From: terry@spcvxb.spc.edu (Terry Kennedy, Operations Mgr.)
Subject: Re: Problem: "No route to host" -- under moderate web traffic
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Organization: St. Peter's College, US
Date: Fri, 5 Jan 1996 14:48:07 GMT
Message-ID: <1996Jan5.094807.1@spcvxb.spc.edu>
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In article <4cii44$fvc@ns2.mainstreet.net>, mwang@pandadesigns.com (Michael Wang) writes:
> 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.
Do a "netstat -r" when the system is working and again when it isn't and
see what's different. Don't run routed or gated unless you absolutely have
to.
> 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).
Look at NMBCLUSTERS and maybe KMAPENTRIES and KMEMSIZE.
Terry Kennedy Operations Manager, Academic Computing
terry@spcvxa.spc.edu St. Peter's College, Jersey City, NJ USA
+1 201 915 9381 (voice) +1 201 435-3662 (FAX)