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Re: Memory Errors OS X

From: "Frank D(dot) Engel, Jr(dot)" <fde101(at)fjrhome(dot)net>
To: pgsql general list <pgsql-general(at)postgresql(dot)org>
Subject: Re: Memory Errors OS X
Date: 2004-12-22 21:17:27
Message-ID: E207BF57-545E-11D9-AF71-0050E410655F@fjrhome.net (view raw or flat)
Thread:
Lists: pgsql-general
What version of OS X?

Apparently some of the earlier versions did not permit changing this 
parameter without recompiling the kernel.  It seems to have been 
changed in the more recent versions, though:

http://www.opendarwin.org/pipermail/hackers/2002-August/003583.html
http://borkware.com/rants/openacs/
http://www.ssec.wisc.edu/mug/users_guide/SharedMemory.html

A note from that last URL is that shmall*4096=shmmax.

And yes, trying to manually run an rc script is a bad idea.

On Dec 22, 2004, at 3:44 PM, Jeffrey Melloy wrote:

> I attempted to install 8.0 RC 2 alongside 7.4.5 on my OS X box, but 
> initdb failed with an error about not enough shared memory.
>
> Remembering that this was a problem for starting two postmasters at 
> the same time on OS X, I increased the shmmax value to 500 megabytes 
> (I had seen something say raising it to half the available ram would 
> be fine), but when I rebooted my machine neither 8.0 or 7.4.5 would 
> start.
>
> So I lowered it to 256 megabytes, thinking there might be an upper 
> limit on that kind of stuff.  When I rebooted my machine, 7.4.5 starts 
> fine, but 8.0 still will not start alongside it.
>
> I don't particularly need both postmasters running at the same time, 
> but I would like to figure out the solution to this problem.
>
> (By the way, in the course of this I attempted to manually run /etc/rc 
> ... there were humorous results and my computer didn't really like it: 
>  http://www.visualdistortion.org/misc/dont_do_this.png)
>
> Jeffrey Melloy
> jmelloy(at)visualdistortion(dot)org
>
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-----------------------------------------------------------
Frank D. Engel, Jr.  <fde101(at)fjrhome(dot)net>

$ ln -s /usr/share/kjvbible /usr/manual
$ true | cat /usr/manual | grep "John 3:16"
John 3:16 For God so loved the world, that he gave his only begotten 
Son, that whosoever believeth in him should not perish, but have 
everlasting life.
$

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