Question about KAIO

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?. 2) Is there any way to configure KAIO?. I looked at TFM and did not find any clue 3) Why only one kio queue is being used?. TIA Tino