Tuning FreeBSD

[Kris Kennaway]

On Sat, Aug 19, 2006 at 04:35:29PM -0400, Lisa Casey wrote:
> Hi Folksm
> 
> I'm getting these on a FreeBSD 5.3 box:
> 
> Aug 19 15:46:32 radius sm-mta[12850]: k7JJk1rt012776: SYSERR(UID0): fill_fd:
> disconnect: cannot open /dev/null:
>  Too many open files in system
> Aug 19 15:46:40 radius kernel: kern.maxfiles limit exceeded by uid 0, please
> see tuning(7).
> Aug 19 15:46:40 radius kernel: kern.maxfiles limit exceeded by uid 0, please
> see tuning(7).
> Aug 19 15:46:35 radius sm-mta[12784]: k7JJk7F0012784: SYSERR(UID0): queueup:
> cannot create queue file ./qfk7JJk
> 7F0012784, euid=0, fd=-1, fp=0x0: Too many open files in system
> 
> I checked, and the system shows:
> 
> radius# sysctl kern.maxfiles
> kern.maxfiles: 1416
> radius# sysctl kern.maxusers
> kern.maxusers: 43
> 
> I googled and read that kern.maxfiles is dependent upon kern.maxusers and
> that I shou;d raise maxusers which I tried to do via sysctl:
> radius# sysctl -w kern.maxusers=50
> sysctl: oid 'kern.maxusers' is a read only tunable
> sysctl: Tunable values are set in /boot/loader.conf
> 
> My /boot/loader.conf is a zero byte length file.
> 
> How can I fix this too many open files problem?

Edit loader.conf and make the specified change, then reboot.  See the
loader.conf manpage for more.

Kris
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