Maybe you have never tested your system with more RAM, or maybe you are curious, whats the effect to feed a starving system. The system in this example had 1G RAM, it runs Oracle 10g server. This is a SWAP usage graph. On June i added 1 more G, and you can see the effect. It now uses 12..25M of SWAP memory compared to 500..700M. Less SWAP means less disk I/O. So lets feed our pure starving servers with more RAM.