Re: The stats of "aio" VP on SingleProc machine in KAIO mode

>My statistics for G50 says, that millions of disk writes go through 'aio', but >when we compare 'onstat -g iov' with 'onstat -g iof', the sum of disk writes >(-g iof) is nearly equal the count of 'kio' disk writes (-g iov), >and similarly for disk reads. There is bug in Informix when kaio thread is running on the aio vp. I don't remember number and workaround, contact your Tech Support. You can check with 'onstat -g ath' - you are running in this bug : 24 c2e97ca0 0 4 sleeping forever 5aio kaio 25 c2e9a130 0 4 sleeping forever 1cpu kaio 26 c2e9a810 0 4 sleeping forever 7aio kaio Also check, if KAIO is really used. I mean permissions, char-oriented files and raw/cooked files. HTH. ------------------------------------------------- With best regards, Yuri Dovgart SAP R/3, Informix technical consultant, Informix Certified Professional, Senior System Consultant System Architecture and High Availability Systems, 'Telecominvest' company Email y_dovgart@tci.ukrtel.net ICQ 39284285