Max NFSD processes

[Steve Shorter]

On Thu, May 20, 2004 at 10:44:14AM -0500, Eric Anderson wrote:
> >
> 
> That's good to hear.  Did you do any other tweaks?  sysctl settings?  
> mbufs? 


net.inet.udp.recvspace=524288
kern.ipc.maxsockbuf=1048576
net.inet.icmp.drop_redirect=1
net.inet.icmp.log_redirect=1

Telus-nfs1:# w
12:41PM  up 212 days, 15 hrs, 3 users, load averages: 0.49, 0.62, 0.71
USER             TTY      FROM              LOGIN@  IDLE WHAT

nfs1:# netstat -m
441/1488/65536 mbufs in use (current/peak/max):
        406 mbufs allocated to data
        35 mbufs allocated to packet headers
242/1040/16384 mbuf clusters in use (current/peak/max)
2452 Kbytes allocated to network (4% of mb_map in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines

> >
> >>Thanks - any help/hints is appreciated.
> >>
> >>   

	Disk design issues  matter cause it is the ultimate 
bottleneck. RAID is you friend.

	Lots of RAM helps. I use 4G. and compile a custom
kernel with maxusers at 256 and KVA_PAGES at 512. You can
check/verify kvm usage with sysclt's vm.kvm_size and vm.kvm_free




> >>
> >
> >	You probably also want good nics (fxp0) and to
> >increase UDP buffer space. I have found that nfs over udp
> >offers supperior performance  than tcp on a good LAN
> > 
> >
> I'm currently using 3com's (xl0,xl1) and Intel Gigabit cards (em0,em1).  
> Most of my clients are using udp. 
> 
> What did you set your buffer space to? Which sysctl did you change?
> 

	udp recvspace. see above.

	-steve