Date: Tue, 18 Aug 1998 11:07:00 -0400 From: "Gessner, Matt" <mattg@aiinet.com> To: "'questions'" <freebsd-questions@FreeBSD.ORG> Subject: Kernel configuration Message-ID: <7283DE19D141D111AD0E00A0C95B1955CF1280@mail2.aiinet.com>
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Hi, I posted to comp.unix.bsd.freebsd.misc but nothing's come back... news takes a while. I'm running 2.2.7-RELEASE, and I've already changed my kernel a bit to allow me to do a whole bunch of simultaneous connections, but I've probably done something wrong, because it ain't working. Here's what I have: P5-166 Gateway 32 MB RAM 2 GB disk, 850MB belongs to FreeBSD, of which 100MB is swap. PCI DEC Ethernet card Here's how I've mangled my poor kernel: maxusers 128 options CHILD_MAX=256 options OPEN_MAX=2048 options NMBCLUSTERS=4096 Here's how I've changed login.conf default and root both have unlimited child process and open file counts. I've done a little poking around in param.c and don't see immediately that I've violated any rules by setting these limits the way I have. When I type limits, I get the following info back: maxprocesses 2067 openfiles 4136 But I can't find anything anywhere that talks about tuning the kernel for doing this. What I need to do is be able to run lots of TCP connections, and I know it can be done with FreeBSD. The connections are being made from FreeBSD to a proprietary board and then to a Solaris machine. My end goal is to be able to bring up about 1024 TCP connections outbound and route them back to the same box, for a total of 2048 connections. Right now, I run 1024 connections to the other system, and what happens is when the sockets are all connected, and the writes start to occur, FreeBSD just reboots the machine -- no messages anywhere. Have I really goofed up somewhere/something? Can anyone give me some insight as to what MIGHT be happening here? E-mail is fine, so's the newgroup. I suppose it's completely possible I'm running out of RAM and swap, but I'd expect to see something in /var/log/messages to that effect. So far, nothing. Recently I uppped NMBCLUSTERS to 4096, but it didn't seem to fix the problem. That was based on some notes in the FAQ. Thanks in advance, Matt Gessner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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