Entry

What is the limit on concurrencyremote?

Sep 7th, 2001 07:17
Frank Tegtmeyer, Dave Sill, http://www.lamer.de/maex/creative/software/qmail/deliveries/

The file "conf-spawn" in the build directory says:
  120
  This is a silent concurrency limit. You can't set it above 255. On
  some systems you can't set it above 125. qmail will refuse to
  compile if the limit is too high.
So, to raise concurrencyremote above 120 requires changing conf-spawn
and recompiling.
There's a patch on www.qmail.org called "big-concurrency" that raises
the limit to 16k or 32k--more than you'll ever need, and probably more 
than your system can handle.
Markus Stumpf did some interesting comparisons of delivery speed
depending on different values of concurrencyremote. The URL is given
above.