Re: Question about KAIO

In article <6glba9$ojq$1@news.xmission.com>, ccremid <ccremid@saadev.saa.noaa.gov> writes > >Informix gurus: > >Basic Information: On-line 7.23UC1, AIX 4.2 , 1 CPU > >Can some one explain the output of onstat -g ioq. Specifically the >lines that refer to kio. I have two servers with similar configuration, >but when I run the onstat command I got the following output. > >INFORMIX-OnLine Version 7.23.UC1 -- On-Line -- Up 1 days 23:59:29 -- >27120 Kbytes > >AIO I/O queues: >q name/id len maxlen totalops dskread dskwrite dskcopy > kio 0 0 0 0 0 0 0 > kio 1 0 32 696237 682454 13783 0 > [ ....] > >and >INFORMIX-OnLine Version 7.23.UC1 -- On-Line -- Up 64 days 16:04:12 -- >31456 Kbytes > >AIO I/O queues: >q name/id len maxlen totalops dskread dskwrite dskcopy > kio 0 0 0 0 0 0 0 > kio 1 0 33 1470835 1181578 289257 0 > kio 2 0 0 0 0 0 0 > [....] > > My Questions are: > 1) Why one server has 2 kio queues and the > other server has 3?. You get one kaio thread and so one kaio queue per CPU VP. > 2) Is there any way to configure KAIO?. I looked at TFM and did > not find any clue No really, some versions of UNIX allow configuration within the kernel but most do not, it is a UNIX Configuration issue not Informix. > 3) Why only one kio queue is being used?. > Possibly because you never get so busy that the second kaio queue is needed i.e. the first kaio thread is always idle when the next request comes in?? >TIA > >Tino -- David Williams Maintainer of the Informix FAQ Primary site (Beta Version) http://www.smooth1.demon.co.uk Official site http://www.iiug.org/techinfo/faq/faq_top.html I see you standin', Standin' on your own, It's such a lonely place for you, For you to be If you need a shoulder, Or if you need a friend, I'll be here standing, Until the bitter end... So don't chastise me Or think I, I mean you harm... All I ever wanted Was for you To know that I care