
> > The O_DIRECT flag has been added to open(2) and fcntl(2). Specifying
this
> > flag for open files will attempt to minimize the cache effects of
reading
> > and writing.
> 
> I wonder if using this for WAL would be good.

Not before the code is not optimized to write more than the current 8k
to 
the WAL at a time.
(The killer currently are larger transactions that produce approx more 
than 64k WAL, (try the open_datasync setting with "copy from"))

Andreas

Mon, 1 Oct 2001 14:15:16 +0200
"Zeugswetter Andreas SB SD" <ZeugswetterA@spardat.at>
Re: O_DIRECT