On 7/25/13 6:02 PM, didier wrote:
> It was surely already discussed but why isn't postresql writing
> sequentially its cache in a temporary file?
If you do that, reads of the data will have to traverse that temporary
file to assemble their data. You'll make every later reader pay the
random I/O penalty that's being avoided right now. Checkpoints are
already postponing these random writes as long as possible. You have to
take care of them eventually though.
--
Greg Smith 2ndQuadrant US greg@2ndQuadrant.com Baltimore, MD
PostgreSQL Training, Services, and 24x7 Support www.2ndQuadrant.com
