[Bug: 21.5-b28] itimer freezes vm

[Aidan Kehoe]

 Ar an fichiú lá de mí Márta, scríobh Stephen J. Turnbull: 

 > Giacomo Boffi writes:
 > 
 >  > when i use vm (the mail agent) xemacs freezes very often, usually with
 >  > no arm and even unfreezes without manual intervention, if i go, e.g.,
 >  > to the coffe machine and back...
 > 
 > I believe that with Mule (at least) some operation that VM does in the
 > background is O(N^2) in buffer size; on a 1.8GHz AMD64 system I only
 > see the freezes when INBOX gets above about 60MB, but then things
 > rapidly get worse.
 > 
 > File I/O, specifically autosaves, can take a long time too if you have
 > many (> 10) VM folders open.

I see that on OS X, with its underperforming filesystem, but not on other
platforms (my VM use is mainly on 64-bit FreeBSD). Giacomo’s on Linux, so
that shouldn’t be it. 

 >  > aside from the bug report, is it possible to put in place an ad
 >  > interim workaround?
 > 
 > Sorry, not at the moment, but I plan to work on this a bit in the near
 > future.  You should try reporting on the VM channels (M-x
 > report-vm-bug is the way to go, I think).

It should be possible to set vm-flush-interval to nil; this will only sync
in-memory changes using the normal autosave procedure and manual saves. This
might be good enough for Giacomo. 

-- 
¿Dónde estará ahora mi sobrino Yoghurtu Nghé, que tuvo que huir
precipitadamente de la aldea por culpa de la escasez de rinocerontes?