From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | Daniel Åkerud <zilch(at)home(dot)se>, PostgreSQL-general <pgsql-general(at)postgresql(dot)org>, pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: Multiple Indexing, performance impact |
Date: | 2001-06-22 22:06:38 |
Message-ID: | 200106222206.f5MM6cI26794@candle.pha.pa.us |
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Lists: | pgsql-general pgsql-hackers |
> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> >> This does remind me that I'd been thinking of suggesting that we
> >> raise the default -B to something more reasonable, maybe 1000 or so
> >> (yielding an 8-meg-plus shared memory area).
>
> > BSD/OS has a 4MB max but we document how to increase it by recompiling
> > the kernel.
>
> Hmm. Anyone like the idea of a platform-specific default established
> by configure? We could set it in the template file on platforms where
> the default SHMMAX is too small to allow 1000 buffers.
Template file seems like a good idea for platforms that can't handle the
default. I don't think configure should be doing such tests because the
target could be a different kernel.
--
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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