Re: kaio

Clem Akins (clema@informix.com) wrote: : >I am sure there are people around who's done the comparison on how KAIO : performs : >against AIO VPs. Ten , fifteen per cent faster ? : >I am interested in HP , but any platform will do. : YMMV! : But I have personally done a benchmark on a large OLTP system on HP and saw a : 10% reduction in average transaction time due to changing only KAIO. : I heard from an Informix tech who personally did his own BM and found the : performance I've seen a noticeable speed improvement by using kaio on an HP K420 with 7 processors and an EMC disk farm. One thing interesting is that a "top" report now shows that the percentage of system/total time is greatly increased. Makes sense, since all the disk i/o (well, almost all) now goes through the kernel and shows up as system time. Joe : breakpoint was at about 3,000 concurrent (simulated with Tuxedo(?)) users, : after : which KAIO significantly hurt performance. Up until that point it helped, : but I : don't recall exactly how much. : Aside from that, and the caveats mentioned in the release notes for certain : versions on HP, I don't know of any reason *not* to use KAIO of your platform : supports it. : Good luck, : ______________________________________________________ : Clem Akins (aka clema@informix.com) : Informix Software, Inc (Standard disclaimers apply) : International Technical Support : Last seen: Dodging raindrops in Wintery Auckland -- --------------------------------------------------------------------------- Joe Lumbley(jlumbley@netcom.com) ---------------------------------------------------------------------------