Bruttaly sluggish Eclipse performance in remote X

Les Mikesell lesmikesell at
Thu Jan 10 14:10:26 UTC 2008

Magnus Gustavsson wrote:
> Dimi Paun <dimi <at>> writes:
>> However, the deal break has been Eclipse.
> I've had a fair amount of problems with Eclipse and X-forwarding as well. They
> seems to be of a different kind than yours, but I thought I'd mention my
> experiences anyway. If nothing else, perhaps somebody has a suggestion about
> what to do?
> I'm running a Sun Ray server on RHEL4. When I use X-forwarding via SSH to a
> RHEL5- or Debian 4.0 (Etch) machine, Eclipse becomes extremly slow. That's
> hardly surprising if I take a look at the network traffic; just scrolling down a
> few pages in Eclipse generates more than 100 MiB of X11 data. I've never had
> this problem before, and that's because when I use X-forwarding to a RHEL4- or
> Debian 3.1 (Sarge) machine, the generated traffic "only" amounts to 5-10 MiB,
> and then the server can cope with it.
> I don't have this problem with other applications, and if I run Eclipse via
> X-forwarding on the console of the Sun Ray server (instead of from a Sun Ray
> client), the generated amount of traffic is much lower. Analyzing the network
> traffic makes me suspect that the reason is that Xnewt (the Sun Ray X-server)
> doesn't support the RENDER extension to X11.
> I havn't managed to figure out what the big difference is between RHEL4/Sarge on
> one hand and RHEL5/Etch on the other though, and if there's something I can do
> about, say, the fonts to at least make it usable until a better solution can be
> found.

Have you tried running freenx with the NX clients from

   Les Mikesell
    lesmikesell at

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