Robert,
> Another point is that parsing overhead is quite obviously not the
> reason for the massive performance gap between one core running simple
> selects on PostgreSQL and one core running simple selects on MySQL.
> Even if I had (further) eviscerated the parser to cover only the
> syntax those queries actually use, it wasn't going to buy more than a
> couple points.
I don't know if you say Jignesh's presentation, but there seems to be a lot of reason to believe that we are lock-bound
onlarge numbers of concurrent read-only queries.
--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com
San Francisco