[K12OSN] tuxtype superslow on 12 gig ram server -K12LTSP

[Petre Scheie]

A few years ago, someone one the list (was it Terrell?) did some testing and found that 
TuxType actually consumed about 73Mb of network bandwidth per client!  The point was, as 
you say, the server really needs to have a gigabit card, perhaps more than one.

http://www.redhat.com/archives/k12osn/2005-October/msg00382.html

Petre

William Fragakis wrote:
> You are running gigabit ethernet out of the server aren't you? The
> clients need only 10/100 but it has to be gigabit from the server to the
> switch beyond 5-6 clients in our experience. Full screen games easily
> grab 10-15 mb/sec (did I get my units right?) of bandwidth which times 6
> gets you to the point where 10/100 begins to saturate. We've seen peaks
> close to 30, iirc.
> 
> If you are, then Jim's explanation supersedes. If not, it will help but
> you will eventually run into the issue Jim mentions. 
> 
> run top in the terminal and if you seem to have plenty of cpu headroom,
> work on the network. if you are maxing out your cpus, again, refer to
> Jim's post. 
> 
> Don't feel too bad. You ought to see what some Flash web sites will do
> to a CPU. (http://www.cheetos.com)
> 
> regards,
> William
> On Wed, 2006-09-27 at 08:06 -0400, k12osn-request at redhat.com wrote:
>> Message: 18
>> Date: Tue, 26 Sep 2006 23:47:42 -0700
>> From: "Jim Kathan" <tkathan at charter.net>
>> Subject: [K12OSN] tuxtype superslow on 12 gig ram server -K12LTSP
>> To: <k12osn at redhat.com>
>> Message-ID: <000001c6e200$d52bc250$4000a8c0 at themm>
>> Content-Type: text/plain; charset="us-ascii"
>>
>> I have a dual core Pentium 3, 12 gigs of ram, super fast HDD with tons
>> of
>> space, and when 20 thin clients with 128 mb of onboard ram are all
>> running
>> things like tuxtype, khangman, etc. they run unbearably slow, to the
>> point
>> that the screen takes literally 5 to 6 seconds to refresh. Its like
>> the game
>> is on pause every other second. Does this sound right?
>>
>> In my lts.conf, I have "enable_nbd_swap = Y", xramperc = 90 (I also
>> put it
>> to 95, no difference), and tried it with both "Local APPS = Y" and
>> "N".
>>
> 
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