Re: fsync method checking

Andrew Dunstan wrote:
> 
> 
> Bruce Momjian wrote:
> 
> >I have been poking around with our fsync default options to see if I can
> >improve them.  One issue is that we never default to O_SYNC, but default
> >to O_DSYNC if it exists, which seems strange.
> >
> >What I did was to beef up my test program and get it into CVS for folks
> >to run.  What I found was that different operating systems have
> >different optimal defaults.  On BSD/OS and FreeBSD, fdatasync/fsync was
> >better, but on Linux, O_DSYNC/O_SYNC was faster.
> >
> >[snip]
> >
> >Linux 2.4.9:
> >    
> >
> 
> This is a pretty old kernel (I am writing from a machine running 2.4.22)
> 
> Maybe before we do this for Linux testing on a more modern kernel might 
> be wise.

Sure, I am sure someone will post results.

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
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