On Wed, May 4, 2011 at 4:44 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Do you have
> any proof that writing out a few GB of buffers and then reading them
> back in is actually much cheaper than letting the database re-read the
> data from the disk files?
I believe he's just writing out the meta data. Ie, which blocks to
re-reread from the disk files.
--
greg