Re: Linux max on shared buffers?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Curt Sampson <cjs(at)cynic(dot)net>
Cc: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>, Jan Wieck <JanWieck(at)Yahoo(dot)com>, GB Clark <postgres(at)vsservices(dot)com>, Martijn van Oosterhout <kleptog(at)svana(dot)org>, glenebob(at)nwlink(dot)com, pgsql-general(at)postgresql(dot)org
Subject: Re: Linux max on shared buffers?
Date: 2002-07-24 06:59:13
Message-ID: 9304.1027493953@sss.pgh.pa.us
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Curt Sampson <cjs(at)cynic(dot)net> writes:
> But this would only cost us more syscalls, which are relatively
> inexpensive (compared to things like memory copies) anyway.

Run that by me again?

I'd take memcpy over a kernel call any day. If you want to assert
that the latter is cheaper, you'd better supply some evidence.

regards, tom lane

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