But would something like this ever really happen in real life. We can all make hardware/software fail once we know what its weaknesses are. Hell, I can make a database server fail. Quite simple really. Walk into the server room and flip the breaker. Shuts down every time! -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Kevin Closson Sent: Thursday, September 15, 2005 3:26 PM To: jkstill@xxxxxxxxx; cmarquez@xxxxxxxxxxxxxxxx Cc: bob_murching@xxxxxxxxx; oracle-l@xxxxxxxxxxxxx Subject: RE: I/O tuning... Allocating spindles to databases >>> >>>It isn't too difficult to write a simulation that will >>>render the cache useless. actually quite easy. create a file that is 100 fold larger than cache and do completely random 4KB transfers. smoked >>> >>> >>>-- >>>Jared Still >>>Certifiable Oracle DBA and Part Time Perl Evangelist >>>11+ years of trying to appear to know what I'm doing. >>>-- >>>//www.freelists.org/webpage/oracle-l >>> -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l