pgsql-bugs(at)postgresql(dot)org writes:
> The postmaster backend seems to be blocked when the identd server of the peer
> accepts the connection but does not respond.
Yes, this is a known shortcoming --- it is (or should be) in the TODO list.
However, it hasn't been very high priority, because you shouldn't be
using ident auth anyway unless you trust the ident server on the other
end. That trust extends to response time as well as reliability of
results...
regards, tom lane