is it ok to use KAIO on HP-UX

Hi, I need info on the Pro's and Con's of running KAIO on HPUX 11.0 using Informix 7.31.FD2. Are there any www links on Performance tests? Sizing issues? I am considering implementing it throughout an ERP (SAP 3.1i_com) landscape. KAIO has been active on a Development system (40 GB on 76 chunks using 24 raw volumes) for over a year without any issues. But this system has very low activity compared with the Production system (725 GB on 589 chunks using 439 raw volumes). The GB mentioned is in assigned table space (not dbspace). The landscape is OLTP 99% of the time. Production system averages 2000 raw I/O's per second during the day, and up to 3000 raw I/O's per second at night. The system has no bottlenecks with CPU, Memory, or Disk. There are 200 NUMAIOVPS configured. In the last 12 days of the system, the overall workload of AIO pids (from unix ps -elf) is as follows: first 25 handles 50% of the aio requests first 50 handles 77% of the aio requests first 75 handles 90% of the aio requests first 100 handles 95% of the aio requests last 100 are actually being used, but only for 5% <-- law of diminishing returns Beside the fact that each AIO requires an open file for each of the 439 raw volumes (links to them), does anyone know if there is a performance penalty for having so many open files on the system (200*439)? If everything seems okay to move to KAIO, is there an issue with setting IFMX_HPKAIO_NUM_REQ to the max value of 5000?