[GENERAL] Postgresql slow on XEON 2.4ghz/1gb ram

Hello. I have this problem: i'm running the postgre 7.3 on a windows 2000 server with  P3 1GHZ DUAL/1gb ram with good performance. For best performance i have change the server for a  XEON 2.4/1gb ram and for  my suprise the performance decrease 80%. anybody have a similar experience? does

[GENERAL] ext3 block size

hello. my database size is 5GB. what is the block size recommend? thanks wilson