Re: PostgreSQL 7.3.3 and Intel C compiler

Hans-J�rgen Sch�nig wrote:
> > But the snapshots only are grabbing the xids from each proc, right? 
> > Doesn't seem that would take very long.
> > 
> > If this is the bottleneck, maybe we need a shared proc lock.
> > 
> 
> 
> I had a hard day testing and verifying this kind of stuff. We have run 
> several hundred benchmarks at the customer using many different 
> settings. SERIALIZABLE was the key to high-performance. I have run 
> dozens of different benchmarks today (cursors, simple selects, 
> concurrent stuff, ...). I have not found a difference. I have no idea 
> why the customer's system was so much faster in SERIALIZABLE mode. They 
> use a native C++ implementation of the FE/BE protocol but as far as I 
> have seen their database layer does not care about transaction isolation 
> too much.

They do the backend protocol using a custom implementation.  Why would
they do that?

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