settings for 8.2.5 on Mac OS X 10.4.11

Matthew Hixson <hixson@poindextrose.org> writes:

What are good settings for shared_buffers and max_connections with
the above software combo? Out of the box I'm getting the "Cannot
allocate memory" message upon doing a 'make check'.

The best thing is to fix the OS' ridiculously small shmem limits.
I've got this in /etc/sysctl.conf:

kern.sysv.shmmax=33554432
kern.sysv.shmmin=1
kern.sysv.shmmni=32
kern.sysv.shmseg=8
kern.sysv.shmall=8192

and on a production DB you'd probably want shmmax and shmall
a good bit higher.

Don't forget to reboot after changing settings. Also, a
"sysctl -a | grep shm" is a good idea to make sure it "took";
OS X is infamously picky about these settings.

regards, tom lane

The best thing is to fix the OS' ridiculously small shmem limits.
I've got this in /etc/sysctl.conf:

kern.sysv.shmmax=33554432
kern.sysv.shmmin=1
kern.sysv.shmmni=32
kern.sysv.shmseg=8
kern.sysv.shmall=8192

Dependency on the available RAM?

and on a production DB you'd probably want shmmax and shmall
a good bit higher.

Don't forget to reboot after changing settings. Also, a
"sysctl -a | grep shm" is a good idea to make sure it "took";
OS X is infamously picky about these settings.

regards, tom lane

A Macnerd as a core developer of Postgres? :-)

Sincerely,

Wolfgang Keller

On Dec 21, 2007, at 2:12 AM, Wolfgang Keller wrote:

The best thing is to fix the OS' ridiculously small shmem limits.
I've got this in /etc/sysctl.conf:

kern.sysv.shmmax=33554432
kern.sysv.shmmin=1
kern.sysv.shmmni=32
kern.sysv.shmseg=8
kern.sysv.shmall=8192

Dependency on the available RAM?

and on a production DB you'd probably want shmmax and shmall
a good bit higher.

Don't forget to reboot after changing settings. Also, a
"sysctl -a | grep shm" is a good idea to make sure it "took";
OS X is infamously picky about these settings.

regards, tom lane

A Macnerd as a core developer of Postgres? :-)

Not surprising. Macs are an absolute joy for developing.

Erik Jones

Software Developer | Emma®
erik@myemma.com
800.595.4401 or 615.292.5888
615.292.0777 (fax)

Emma helps organizations everywhere communicate & market in style.
Visit us online at http://www.myemma.com