Re: 5.x-->7.x slowdown. was 7.1 & HP-UX 10.x...
Posted in 1996
>[...] > > When comparing Online 5.x to Online 7.X +- 50% slower. (No kidding) >[...] > amounts of CPU time which slowed everything else down. Our comparison > indicated we weren't even half as fast as on 5.07!! :-( >[...] You seem to know what you're doing, so if this doesn't apply to you then take it as help to the lurking masses who won't know this much... One source of performance decrease when upgrading from 5.x to 7.x is the omission of the mandatory index rebuild. Indexes are different under releases after 5, and they must be rebuilt as part of the migration process. Drop and re-create indexes! There are also many more engine variables to play with, a performance sword that cuts both ways. It is much more involved to tune an engine under version 7 than version 5. Of course, there could conceivably be more serious problems, too. "Inconceivable!" "Perhaps you don't understand what that word means..." -from "The Princess Bride"