Hmmm. I'm running a small OLTP Informix database (40 gig) against a DS4300 and I've only got one aioserver running
# pstat -a | egrep 'aioserver' | wc -l
1
OTOH, I've no real wait problems.
System configuration: lcpu=16 mem=8191MB ent=2.00
kthr memory page faults cpu
----- ----------- ------------------------ ------------ -----------------------
r b avm fre re pi po fr sr cy in sy cs us sy id wa pc ec
6 0 1132506 563221 0 0 0 0 0 0 2732 70428 27946 58 30 12 0 3.62 180.9
7 0 1130121 565596 0 0 0 0 0 0 2862 258133 22578 61 28 11 0 3.51 175.3
6 0 1130081 565627 0 0 0 0 0 0 1895 68311 27112 59 29 12 0 3.47 173.7
6 0 1130212 565487 0 0 0 0 0 0 2249 163425 24999 56 31 13 0 3.37 168.3
8 0 1132209 563475 0 0 0 0 0 0 2606 89374 26184 60 29 11 0 3.55 177.6
7 0 1132437 563242 0 0 0 0 0 0 3039 141354 26596 59 29 12 0 3.54 176.8
8 0 1131557 564115 0 0 0 0 0 0 3009 89020 26079 59 30 12 0 3.48 173.9
9 0 1131228 564393 0 0 0 0 0 0 3562 66818 18498 69 23 8 0 3.75 187.3
7 0 1130138 565566 0 0 0 25 92 0 3877 131415 24682 61 28 11 0 3.64 182.0
So I'm guessing at this point, the caching in the DS4300 is responsible the the zero wait times. Informix likes KAIO, and works well with it. I've been running with it since
AIX 4.3.3 and Informix 7.23.
Dave