onload stop responding.

I have a problem with onload on our HP server. I just typed "onload -," to get the help, but onload just stucked there and wont quit. After I ctrl-C to exit, the system is very slow. I used top and find out oninit seems used 99% of CPU time. Here is the output of onstat -g ath: Threads: tid tcb rstcb prty status vp-class name 2 d108ab48 0 2 sleeping forever 3lio lio vp 0 3 d108adc0 0 2 sleeping forever 4pio pio vp 0 4 d10a2128 0 2 sleeping forever 5aio aio vp 0 5 d10a2368 0 2 ready 6msc msc vp 0 6 d10a25d0 0 2 sleeping forever 7aio aio vp 1 7 d10a2870 0 2 sleeping forever 8aio aio vp 2 8 d10a2b10 0 2 sleeping forever 9aio aio vp 3 9 d10a2db0 0 2 sleeping forever 10aio aio vp 4 10 d10a6248 0 2 sleeping forever 11aio aio vp 5 11 d10a6488 0 2 sleeping forever 12aio aio vp 6 12 d10a66c8 0 2 sleeping forever 13aio aio vp 7 13 d10a6a88 d0fb7018 4 sleeping secs: 1 1cpu main_loop() 14 d10ba490 0 2 running 1cpu sm_poll 15 d111e150 0 2 running 14soc soctcppoll 16 d111e738 0 3 sleeping forever 1cpu sm_listen 17 d1132438 0 2 sleeping secs: 1 1cpu sm_discon 18 d1132a48 0 3 sleeping forever 1cpu soctcplst 19 d1136150 d0fb7504 2 sleeping forever 1cpu flush_sub(0) 20 d11363b8 d0fb79f0 2 sleeping forever 1cpu flush_sub(1) 21 d1136658 d0fb7edc 2 sleeping forever 1cpu flush_sub(2) 22 d11368f8 d0fb83c8 2 sleeping forever 1cpu flush_sub(3) 23 d1136b98 d0fb88b4 2 sleeping forever 1cpu flush_sub(4) 24 d1136e38 d0fb8da0 2 sleeping forever 1cpu flush_sub(5) 25 d114a128 d0fb928c 2 sleeping forever 1cpu flush_sub(6) 26 d114a390 d0fb9778 2 sleeping forever 1cpu flush_sub(7) 27 d114aeb0 d0fb9c64 3 sleeping forever 1cpu aslogflush 28 d114e3c8 d0fba150 2 sleeping secs: 14 1cpu btclean 44 d117e688 d0fbb014 4 sleeping secs: 1 1cpu onmode_mon 51 d11aad18 d0fbab28 2 cond wait loa_done 1cpu onload 52 d11ae618 0 2 ready 16cpu loa_tape_worker The last thread sitting on ready mode forever. and thread 51 is on cond wait, looks like it is waiting a signal, but somehow it is never send. Does anyone has any idea what might cause this? Please let me know what else I should check to find the problem. Thanks for help!

BTW, I am using Informix 7.31UC4. I also tried 7.31UD6. Same problem. The other interesting part I just discovered today is that right after the IDS engine is brought up, "onload -," works fine. It display the help and then quit. After about 10 minutes, it will stall if I run it. There should be enough shared memory since I can run two IDS instances without any problem, as long as I dont type "onload -,". Thanks in advance.