kaio question

hi all: I got a few questions about kaio. 1. how do I know informix is using kaio instead of aiovp? 2. how do I turn kaio on if it is not on? 3. generally how much a performance boost do I get with kaio instead of aiovp? thank you. yan

Yan Zhu wrote: > 1. how do I know informix is using kaio instead of aiovp? onstat -g ioq will show a kio entry for each CPU vp you have defined. Ifyou're not using kaio, there won't be any kio entries. HP-UX will tell you it's being used in the Online message log. > 2. how do I turn kaio on if it is not on? Use raw disk. On Solaris, it'll be used by default. On HP-UX you set an environment variable before issuing your oninit (KAIOON=1), and you must have the async drivers linked into the kernel. > 3. generally how much a performance boost do I get with kaio instead >of aiovp? Very difficult to quantify unless you actually set out to benchmark it. And I never have. Neil Truby aracnet Limited Weybridge, UK