[Unison-hackers] unison stalling on low bandwidth lines with ssh

[Andrew Schulman]

> > When using it over a relatively low-bandwidth DSL line via ssh over VPN,
> > unison often stalls. Sometimes during startup, sometimes, during
> > 'reconceiling changes', but most often at the beginning of or during
> > transfer. I've read about stalls on the mailing list, but they were
> > related to execution on Windows.
> 
> Even though there was pretty much a lack of answers on this list, I
> wanted to comment about my findings.
> 
> This turned out to be a subtle MTU issue with VPN networks. So nothing
> wrong in unison.

Thanks for the followup.  MTU issues can be a real curse, not because
they're hard to solve, but because you're likely to try everything else you
can think of before you think of fiddling with the MTU.