Josh Berkus wrote:
> 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.

A much simpler solution would be for the postmaster to run a test during

  Bruce Momjian                        |
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TIP 9: the planner will ignore your desire to choose an index scan if your
      joining column's datatypes do not match

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