[Standards] s2s and gracelessly broken streams

[Richard Dobson]

> I would also say "don't impose a requirement to send non-information 
> bearing octets around purely to maintain a connection", too. 
> Basically, if you say "s2s connections MAY be timed out when idle, and 
> such a timeout MUST NOT be lower than 30 minutes", then this gets 
> translated into implementations as "servers MUST send their peers some 
> useless stanza every 25 minutes", which - supposing we take Tony's 
> figures - means that he might be getting or sending 3.3 of these every 
> second on average.
As a note though we must ensure we don't specify particular required 
time-out periods in the specs, these should be left entirely up to the 
implementation as if done correctly these will likely be dynamically 
variable depending on the resource utilisation on the server, i.e. if a 
servers resources are becoming constrained it would decrease the 
time-out period depending on just how constrained it is and also if a 
server is not constrained and has plenty of resources going spare it 
would keep the connections open for longer and longer periods to avoid 
needing to set the connections up again.

Richard