Darren Davis schrieb:

http://biz.yahoo.com/bw/061003/20061003005999.html?.v=1

Just a small remark. They write "The test database was copied onto the test drive." in http://www.worlds-fastest.com/disk2.pdf And they claim correctly: "The percentage of a disk that is used will affect the performance that the drive delivers. A drive where the working set of data almost fills the drive will have many seeks across the entire surface of the drive. These long seeks are very slow in comparison to tightly clustered seeks." So to get rid of disk effects and really test 32bit vs. 64bit, they should have checked disk performance over all cylinders and make sure, that the test database is always in the fastest region of the disk, e.g. by creating a small partition there, which just fits the size of the database. Maybe they did this, but they do not write it. So if they just installed the 64bit parallel to the 32bit SLES and the system and database were not located on the same disk space (and therefore disk performance was not the same) the tests are including more than just the 32/64bit difference. Ciao Siegbert