On Thu, Jun 16, 2011 at 12:43 PM, Greg Smith <greg@xxxxxxxxxxxxxxx> wrote: > There are already three layers involved here: > > -Database shared_buffers cache > -Operating system read/write cache > -RAID controller cache > > I would be skeptical that adding a fourth one near the bottom of this stack > is likely to help a lot. And you're adding a whole new layer of difficult > to test reliability issues, too. Overly complicated storage solutions tend > to introduce complicated failures that corrupt your data in unexpected ways. Plus each layer is from a different provider. The drive manufacturers point to the RAID controller maker, the RAID controller people point at the SSDs you're using, and so on... -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
