Re: Allowing WAL fsync to be done via O_SYNC

> Bruce Momjian wrote:
> > 
> <snip>
> > No one will ever do the proper timing tests to know which is better except us.
> 
> Hi Bruce,
> 
> I believe in the future that anyone doing serious benchmark tests before
> large-scale implementation will indeed be testing things like this. 
> There will also be people/companies out there who will specialize in
> "tuning" PostgreSQL systems and they will definitely test stuff like
> this... different variations, different database structures, different
> OS's, etc.

But I don't want to go the Informix/Oracle way where we have so many
tuning options that no one understands them all.  I would like us to
find the best options and only give users choices when there is a real
tradeoff.

For example, Tom had a nice fsync test program.  Why can't we run that
on various platforms and collect the results, then make a decision on
the best default.

Trying to test the affects of fsync() with a database wrapped around it
really makes for difficult measurement anyway.

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
853-3000+  If your life is a hard drive,     |  830 Blythe Avenue +  Christ can be your backup.        |  Drexel Hill,
Pennsylvania19026