Horton

Re: Wierd context-switching issue on Xeon patch for 7.4.1

Josh Berkus <josh@agliodbs.com>

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From: Josh Berkus <josh@agliodbs.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Bruce Momjian <pgman@candle.pha.pa.us>, pg@fastcrypt.com, Paul Tuckfield <paul@tuckfield.com>, Anjan Dave <adave@vantage.com>, Neil Conway <neilc@samurai.com>, Dirk Lutzebäck <lutzeb@aeccom.com>, pgsql-performance@postgresql.org
Date: 2004-04-22T18:11:43Z
Lists: pgsql-performance 
Tom,

> Having to recompile to run on single- vs dual-processor machines doesn't
> seem like it would fly.

Oh, I don't know.  Many applications require compiling for a target 
architecture; SQL Server, for example, won't use a 2nd processor without 
re-installation.   I'm not sure about Oracle.

It certainly wasn't too long ago that Linux gurus were esposing re-compiling 
the kernel for the machine.

And it's not like they would *have* to re-compile to use PostgreSQL after 
adding an additional processor.  Just if they wanted to maximize peformance 
benefit.

Also, this is a fairly rare circumstance, I think; to judge by my clients, 
once a database server is in production nobody touches the hardware.

-- 
-Josh Berkus
 Aglio Database Solutions
 San Francisco