Apache :
Performance Apache : http://ftp.traduc.org/doc-vf/gazette-linux/html/2006/123/lg123-D.html
Httpd performance tuning :http://httpd.apache.org/docs/2.2/misc/perf-tuning.html
Max perf for apache : http://linuxgazette.net/123/vishnu.html
Linux :
Vmstat/IoStat : http://www.softpanorama.org/Utilities/vmstat.shtml
