shmmax tops out at 2G?

[Michael K. Smith - Adhost]

Hello Bill:

-----Original Message-----
From: owner-freebsd-questions at freebsd.org
[mailto:owner-freebsd-questions at freebsd.org] On Behalf Of Bill Moran
Sent: Monday, December 11, 2006 2:15 PM
To: questions at freebsd.org
Subject: shmmax tops out at 2G?


uname -a
FreeBSD db00.lab00 6.2-BETA3 FreeBSD 6.2-BETA3 #1: Fri Dec  8 09:27:37
EST 2006     root at db00.lab00:/usr/obj/usr/src/sys/DB-2850-amd64  amd64

sysctl kern.ipc.shmmax=2200000000
kern.ipc.shmmax: 2100000000 -> -2094967296

Looks like an unsigned 32-bit int.  That doesn't seem to scale as well
as
would be expected on 64-bit arch.

Is this a mistake, or intentional?  I'm working with some big memory
systems, and I sure would like to allocate more than 2G for PostgreSQL
to use ...

-- 
Bill Moran
Collaborative Fusion Inc.

---

This may be a silly question but, have you compiled a PAE-enabled
kernel?  If not, check out /sys/i386/conf/PAE.

Regards,

Mike