xl(4) & polling

[Subhro]

On 5/11/2005 11:14, Rob wrote:

>>When I have to put up a new FreeBSD box, I start
>>from 100 and start beefing up the number until I
>>find a good balance.
>>    
>>
>
>Hmmm, how do you "find a good balance" ?
>Network access speed vs. lost connections.....?
>
>  
>
Yes. The access times during the top load period and the average load 
period helps me to decide the "ideal value". Also its worthwhile to 
adjust the values:

sysctl -a | grep nmbcluster

They determine the number of buffers available for storing network 
connections.

>
>Interestingly: HZ=1000 is apparently a problem with
>the xl devices (3Com 3c905B-TX), but not with the
>rl devices (RealTek 8139).
>What could cause that difference? Could a difference
>in buffer size on the LAN card cause this?
>  
>
Highly possible. But it also depends on the sysctl values I mentioned 
above.

Regards
S.