Re: oninit processes

Terence Chang wrote: > I'm just puzzled by the no of oninit processes when on-line starts > up. You will have one oninit process for each VP you start. So, you just add cpuvs + liovp + piovp + admvp + mscvp + netvp + aiovp. > By default, the NUMAIOVPS is left blank, which according to the > Informix guide implies that NUMAIOVPS is 2 for single > processor CPU. When left to blank Never leave them blank. Even if it means setting it up to the default value. It's easier to administer if you look at the values and don't have to remember them or look for them in the documentation. > If I'm using all raw devices for chunks with the exception of a cooked > file for the online.log, does these reduced oninit processes have any > impact on performance? If you have KAIO (Kernel I/O) you will only need one AIOVP to handle your cooked file. To find out if you're using KAIO check onstat -g glo and look for kio, if they're there rejoice :-) Check your release notes to see if kio is available for your platform, and if yes, check you have the appropiate patches applied to AIX. If not, then you will need one AIO VP for every DISK holding a chunk. -- Ernesto Hern'ndez-Novich - emhn@telcel.net.ve Just another Unix/Perl/Java hacker. One thing is to be the best, and another is to be the most popular. Unix: Live free or die!