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
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