You should always use 10. Using 2 just shows that you don't understand binary. There are only 10 kinds of people: those who understand binary and those who do not. You wouldn't want to use number system based on the number 1010, would you? -- Mladen Gogala Ext. 121 _____ From: Herring Dave - dherri [mailto:Dave.Herring@xxxxxxxxxx] Sent: Tuesday, September 27, 2005 5:34 PM To: Oracle-L@Freelists. Org (E-mail) Subject: base 2 or base 10? Is there any real performance benefit to using base 2 sizes vs. base 10 when dealing with datafiles and extents?