From: Bruce Momjian <pgman@candle.pha.pa.us>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: PostgreSQL-documentation <pgsql-docs@postgresql.org>
Subject: Re: Default shared memory SGML mention
Date: Tue, 8 May 2001 16:06:25 -0400 (EDT)
Message-ID: <200105082006.f48K6Qw27411@candle.pha.pa.us> (raw)
In-Reply-To: <7775.989352308@sss.pgh.pa.us>
> Bruce Momjian <pgman@candle.pha.pa.us> writes:
> >> A little experimentation shows that the present multiplier for -B is
> >> about 8350 bytes and the multiplier for -N about 14580 bytes on my
> >> system (HPUX), which extrapolates to a fixed base of about 250K plus
> >> the -B and -N contributions. In reality I believe the computation
> >> is somewhat nonlinear, but that's probably close enough for starters.
>
> > I have updated the SGML sources to say for default shared memory values:
>
> > 250 kB + 8192 * buffers or infinity
>
> How did infinity get into this? And what happened to the -N
> contribution?
Infinity was always there. The column is labeled "Typical Values". As
far as -N, buffers is always 2*N, right, so I figured it was in there
already.
--
Bruce Momjian | http://candle.pha.pa.us
pgman@candle.pha.pa.us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
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To: pgsql-docs@postgresql.org
Cc: pgman@candle.pha.pa.us, tgl@sss.pgh.pa.us
Subject: Re: Default shared memory SGML mention
In-Reply-To: <200105082006.f48K6Qw27411@candle.pha.pa.us>
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