On Thu, Sep 01, 2005 at 10:13:59PM +0100, Matthew Sackman wrote: > Well that's the thing - on the queries where it decides to use the index > it only reads at around 3MB/s and the CPU is maxed out, whereas when it > doesn't use the index, the disk is being read at 60MB/s. So when it > decides to use an index, I don't seem to be IO bound at all. Or at least > that's the way it seems to me.
You are I/O bound; your disk is doing lots and lots of seeks. The SATA interface is not the bottleneck; the disk's ability to rotate and move its heads is. /* Steinar */ -- Homepage: http://www.sesse.net/ ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster
