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Re: Multiple Indexing, performance impact

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Lincoln Yeoh <lyeoh(at)pop(dot)jaring(dot)my>
Cc: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>, 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: 2001-06-23 04:53:47
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Lists: pgsql-generalpgsql-hackers
Lincoln Yeoh <lyeoh(at)pop(dot)jaring(dot)my> writes:
> Why is SHMMAX so low on some O/Ses?

Historical artifact, I think: the SysV IPC code was developed on
machines that were tiny by current standards.  Unfortunately, vendors
haven't stopped to review their kernel parameters and scale them up

			regards, tom lane

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