From owner-freebsd-current  Sat Apr 20 20:10:21 2002
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Date: Sun, 21 Apr 2002 00:10:01 -0300 (ADT)
From: "Marc G. Fournier" <scrappy@hub.org>
To: Terry Lambert <tlambert2@mindspring.com>
Cc: freebsd-current@freebsd.org, <freebsd-stable@freebsd.org>
Subject: Re: FreeBSD 4.5-STABLE not easily scalable to large servers ... ?
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On Sat, 20 Apr 2002, Terry Lambert wrote:

> "Marc G. Fournier" wrote:
> > Over the past week, I've been trying to get information on how to fix a
> > server that panics with:
> >
> > | panic: vm_map_entry_create: kernel resources exhausted
> > | mp_lock = 01000001; cpuid = 1; lapic.id = 01000000
> > | boot() called on cpu#1
> >
> > Great ... but, how do I determine what 'resources' I need to increase to
> > avoid that crash?  I've tried increasing maxusers from 512->1024, but *if*
> > that works, I imagine I'm raising a bunch of limits (and using memory)
> > that I don't have to ...
> >
> > The server is a Dual-CPU PIII-1Ghz with 3Gig of RAM and ~3Gig of swap
> > space right now ... the data drive is 5x18gig drives in a RAID5
> > configuration (hardware RAID, not vinum) ...
>
> You have more memory than you can allocate kernel memory to
> provide page table entries for.
>
> The only solution is to increase your kernel virtual address
> space size to accomodate the page mappings.
>
> How to do this varies widely by the version of FreeBSD you are
> using, and, unless you read "NOTES" and are running a recent
> -current, is not incredibly well documented, and requires an
> understanding of how the virtual address space is laid out and
> managed (which is also not well documented anywhere).

Ya, this is the roadblock I'm hitting :(  I'm running 4.5-STABLE here, as
of this afternoon ... thoughts/suggestiosn based on that?

Also, is there somethign that I can run to monitor this, similar to
running netstat -m to watch nmbclusters?


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