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 17:11:04 -0400 (EDT)
Message-ID: <200105082111.f48LB5E03982@candle.pha.pa.us> (raw)
In-Reply-To: <8134.989354268@sss.pgh.pa.us>
> Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > Yes, but shared memory limits are based on buffers, not connections,
> > right? The per-connection overhead is pretty small, no?
>
> I gave you my experimentally-derived formula already:
>
> 250Kb + 8350 * B + 14580 * N
>
> I don't see how you can consider the N term negligible.
OK, patch applied.
--
Bruce Momjian | http://candle.pha.pa.us
pgman@candle.pha.pa.us | (610) 853-3000
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Attachments:/bjm/diff (text/plain, 831B) download
Index: doc/src/sgml/runtime.sgml
===================================================================
RCS file: /home/projects/pgsql/cvsroot/pgsql/doc/src/sgml/runtime.sgml,v
retrieving revision 1.64
diff -c -r1.64 runtime.sgml
*** doc/src/sgml/runtime.sgml 2001/05/07 15:55:27 1.64
--- doc/src/sgml/runtime.sgml 2001/05/08 21:09:21
***************
*** 1481,1487 ****
<row>
<entry><varname>SHMMAX</></>
<entry>Maximum size of shared memory segment (bytes)</>
! <entry>250 kB + 8192 * buffers or infinity</entry>
</row>
<row>
--- 1481,1487 ----
<row>
<entry><varname>SHMMAX</></>
<entry>Maximum size of shared memory segment (bytes)</>
! <entry>250 kB + 8.2kB * buffers + 14.2kB * max_connections or infinity</entry>
</row>
<row>
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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: <200105082111.f48LB5E03982@candle.pha.pa.us>
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