From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | PostgreSQL-documentation <pgsql-docs(at)postgreSQL(dot)org> |
Subject: | Default shared memory SGML mention |
Date: | 2001-05-02 16:17:33 |
Message-ID: | 200105021617.f42GHX811076@candle.pha.pa.us |
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Lists: | pgsql-docs |
I am looking over the shared memory SGML files, and found that on my
BSD/OS system, I get as the following default shared memory size:
m 131072 5432001 --rw------- postgres user postgres
user 1 1236992 10622 10622 12:11:14 12:11:15 12:11:14
^^^^^^^
I have highlighted the size. If I subtract the default shared memory
buffers, I get:
1236992 - 8192 * 64
712704
so by my computations, we need about 700k added to the shared buffer
cache area. The documentation says to add 512k, not 700k. My guess is
that the non-cached shared memory area has increased in a recent
release, and docs were not updated. I will bump up the SGML mention to
700k unless someone shows a lower default shared memory size.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)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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