From: Christopher Browne <cbbrowne@acm.org>
Subject: Re: go for a script! / ex:  PostgreSQL vs. MySQL
Date: Mon, 13 Oct 2003 19:58:36 -0400
Organization: cbbrowne Computing Inc
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	<200310121331.42693.josh@agliodbs.com>
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To: pgsql-performance@postgresql.org

Centuries ago, Nostradamus foresaw when khera@kcilink.com (Vivek Khera) would write:
>>>>>> "JB" == Josh Berkus <josh@agliodbs.com> writes:
>
> JB> Chris,
>>> > PostgreSQL requires some more shared memory to cache some tables, x Mb,
>>> > do you want to increase your OS kernel parameters?
>>> >
>>> >    Tweak shmmax and shmmall
>>> 
>>> Note that this still requires a kernel recompile on FreeBSD :(
>
> JB> Not our fault, now is it?  This would mean that we wouldn't be
> JB> able to script for FreeBSD.  Bug the FreeBSD developers.
>
> "I read it on the net so it must be true" applies here.  You /can/ set
> these values via sysctl calls.

Yes, indeed, sysctl can tweak these values fairly adequately.

Now, numbers of semaphors are not as readily tweaked; I wound up
limited, the other day, when I tried setting values for...

  kern.ipc.semmns
  kern.ipc.semmni
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