Mike,
On 08/11/14 07:23, Mike Cammilleri wrote:
> So I've been experimenting with various hardware for our LTSP servers.
> Everything from VM's to this current Intel(R) Xeon(R) CPU E5-2630 0 @
> 2.30GHz (12 core) with ~48GB of RAM. (Dell Poweredge).
>
> Thin client is a Zotac ZboxSD13-ID13 with 4GB of RAM and an Intel Atom
> D525 (1.8 GHz, dual-core).
>
> I have a 1gigabit connection all the way from the thin client to the
> LTSP server.
>
> Why are things always laggy? Multiple tabs in Firefox - will take 5
> seconds after each click for anything to happen. Clicking between
> windows has same almost 5 second lag or more. Of course watching a
> Youtube video slows everything down.
>
> I installed xosview to monitor the server and I do notice the network
> graph pegging at the top of the chart, but the actually numbers are just
> fluctuating from 6K to 5Mbit so I'm not sure network is the problem. But
> there is no way that this LTSP server shouldn't be able to handle a
> single thin-client efficiently. However I've seen this behavior on our
> other LTSP server configurations as well. I can't seem to track down the
> slowness - RAM looks good and CPU time is very low.
>
> Could it be a lag in the actual transmission of X (video) to my monitor?
> When I type this email the cursor is moving fine. If I type in Firefox
> its laggy again. I'm stumped.
>
> What should one look for when optimizing LTSP for performance?
> Everything I read says I'm doing it fine as far as meeting the LTSP
> server system requirements but I can't have users using such a lagging
> interface.
>
> Thanks for any advice!
> mike
If you install virtualbox and create a PXE boot VM you could do a test
like this and it would prove that it's your thin client hardware or not.
Another trick I do is use my notebook to test as it has a better
graphics card than some of these thin clients and see if it has the same
problem when I use it to PXE boot from the LTSP machine.
from
Michael
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