On 02.03.2007, at 14:20, Alex Deucher wrote:
Ah OK. I see what you are saying; thank you for clarifying. Yes, the SAN is configured for maximum capacity; it has large RAID 5 groups. As I said earlier, we never intended to run a DB on the SAN, it just happened to come up, hence the configuration.
So why not dumping the stuff ones, importing into a PG configured to use local discs (Or even ONE local disc, you might have the 16GB you gave as a size for the db on the local machine, right?) and testing whether the problem is with PG connecting to the SAN. So you have one factor less to consider after all your changes.
Maybe it's just that something in the chain from PG to the actual HD spindles kills your random access performance for getting the actual rows.
cug
