The Hermit Hacker <scrappy@hub.org> writes: > Okay, I just checked out Solaris 8/x86, and it confirms what HP/ux
thinks: > _SC_OPEN_MAX OPEN_MAX Max open files per >
process > I'm curious as to whether FreeBSD is the only one that doesn't follow this >
"convention"?
From part of the NetBSD manpage for sysconf(3):
DESCRIPTION This interface is defined by IEEE Std1003.1-1988 (``POSIX''). A far more complete interface is
availableusing sysctl(3).
_SC_OPEN_MAX The maximum number of open files per user id.
_SC_STREAM_MAX The minimum maximum number of streams that a process may have open at any one
time.
BUGS The value for _SC_STREAM_MAX is a minimum maximum, and required to be the same as ANSI C's FOPEN_MAX, so the
returnedvalue is a ridiculously small and misleading number.
STANDARDS The sysconf() function conforms to IEEE Std1003.1-1990 (``POSIX'').
HISTORY The sysconf function first appeared in 4.4BSD.
This suggests that _SC_STREAM_MAX might be a better value to use. On
one of my NetBSD boxes I have the following:
_SC_OPEN_MAX: 64
_SC_STREAM_MAX: 20
In any case, if this really follows the POSIX standard, perhaps
PostgreSQL code should assume these semantics and work around other
cases that don't follow the standard (instead of work around the POSIX
cases).
Cheers,
Brook
