Re: 8.0.X and the ARC patent - Mailing list pgsql-hackers

From Bruce Momjian
Subject Re: 8.0.X and the ARC patent
Date
Msg-id 200502190415.j1J4Fbm15588@candle.pha.pa.us
Whole thread Raw
In response to Re: 8.0.X and the ARC patent  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: 8.0.X and the ARC patent  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
Tom Lane wrote:
> Still to be determined: what we lose in extra I/O from the presumably
> less efficient cache management; also what sort of slowdown occurs on
> a single-CPU machine that isn't going to get any benefit from the
> increased amount of lock management.  But it looks promising.

Yea, that was one of my questions --- the new buffer locking helps SMP,
but how much does it hurt single-cpu machines?  Do we need autodetection
or a GUC to control SMP-beneficial locking?

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
359-1001+  If your life is a hard drive,     |  13 Roberts Road +  Christ can be your backup.        |  Newtown Square,
Pennsylvania19073
 


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