On Apr 14, 2011, at 2:49 AM, Claudio Freire <klaussfreire@xxxxxxxxx> wrote: > This particular factor is not about an abstract and opaque "Workload" > the server can't know about. It's about cache hit rate, and the server > can indeed measure that. The server can and does measure hit rates for the PG buffer pool, but to my knowledge there is no clear-cut way for PG to know whether read() is satisfied from the OS cache or a drive cache or the platter. ...Robert -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
