On Sat, Nov 20, 2004 at 11:50:49PM +0100, Ziga Mahkovec wrote: > This chart includes data from iostat (sysstat package). Notice how the > disk is fully utilized (%util) during readahead, but the throughput > (rkB/s) is *really* low. This could very well be a problem with my hard > disk. hdparm seems fine though (and I checked the parameters before > running readahead). Disks are very very seek constrained. You get wonderful performance reading linear data. The moment you read a lot of scattered files or a file with a lot of segments you will get low performance - even more so on laptops than desktops
