[NiteWave]

quick comment:
1.run "top -c" on command line, see if litespeed process is often on top lines(which consume most CPU)

2.these cache can co-exist

3.default setting should be ok, usually you needn't take time on these settings if no performance issue human found.

however, cache setting is a bit tricky at present. you can check our wiki(http://www.litespeedtech.com/support/wiki/doku.php) cache section for more detail.

also, lsws admin console->real time stats is a unique and valuable place to monitor the whole lsws server's performance.