[tac_plus] SOMAXCONN too small

[Stephen Satchell]

In our shop, we have a number of NAS devices talking to a pair of 
tac_plus servers in a failover configuration.  The configuration file 
changes constantly.  (Don't ask.)  What we have been experiencing is 
that during periods of heavy login activity, some of the users have been 
left high and dry, sparking tech support calls and a degraded customer 
experience.

Investigating the source, I see that SOMAXCONN is set to 5 (by default? 
  Didn't see any way to adjust from ./configure) which for our 
application is, I suspect, too small.

Is there a particular reason your LISTEN queue is so short?  Or is this 
one of the those situations where "5 should be enough for the usual cases"?

I'll be patching the source to boost this to 50 to see what happens.