onstat -g iov

No doubt the real answer is RTFM. But, can anyone give me or point me to a good description of the i/o -wakeup ratio, and why 0.5 is "good"?: onstat -g iov -r 5 IBM Informix Dynamic Server Version 10.00.FC8W2 -- On-Line (Prim) -- Up 81 days 06:27:37 -- 46892464 Kbytes AIO I/O vps: class/vp s io/s totalops dskread dskwrite dskcopy wakeups io/wup errors kio 0 i 41.6 36343 21594 14749 0 57257 0.6 0 kio 1 i 37.9 33161 13908 19253 0 49383 0.7 0 kio 2 i 27.8 24334 14429 9905 0 38749 0.6 0 kio 3 s 33.7 29439 16651 12788 0 46029 0.6 0 kio 4 i 15.3 13339 7557 5782 0 20654 0.6 0 kio 5 i 19.5 17059 10091 6968 0 27466 0.6 0 kio 6 i 0.9 762 100 662 0 798 1.0 0 kio 7 i 2.0 1721 429 1292 0 2021 0.9 0 kio 8 i 6.9 6051 3385 2666 0 9600 0.6 0 kio 9 i 3.2 2788 1128 1660 0 3899 0.7 0 kio 10 i 1.0 833 63 770 0 930 0.9 0 kio 11 i 4.3 3768 2346 1422 0 5835 0.6 0 kio 12 i 11.0 9636 5736 3900 0 15246 0.6 0 kio 13 i 1.4 1222 230 992 0 1460 0.8 0 kio 14 i 1.4 1237 131 1106 0 1343 0.9 0 kio 15 i 1.1 929 194 735 0 1038 0.9 0 kio 16 i 1.4 1264 220 1044 0 1491 0.8 0 kio 17 i 2.7 2350 924 1426 0 3004 0.8 0 kio 18 i 1.0 869 131 738 0 953 0.9 0 kio 19 i 0.7 625 108 517 0 718 0.9 0 kio 20 i 0.7 596 166 430 0 696 0.9 0 kio 21 i 2.3 1990 98 1892 0 1774 1.1 0 kio 22 i 0.5 416 57 359 0 504 0.8 0 kio 23 i 0.6 514 58 456 0 650 0.8 0 kio 24 i 0.3 262 79 183 0 360 0.7 0 kio 25 i 0.6 500 71 429 0 591 0.8 0 kio 26 i 0.7 603 26 577 0 614 1.0 0 kio 27 i 0.2 206 64 142 0 303 0.7 0 msc 0 i 1.0 863 0 0 0 861 1.0 0 aio 0 i 0.3 294 98 0 0 294 1.0 0 aio 1 i 0.0 0 0 0 0 0 0.0 0 aio 2 i 0.0 0 0 0 0 0 0.0 0 pio 0 i 0.0 0 0 0 0 0 0.0 0 lio 0 i 0.0 0 0 0 0 0 0.0 0 thx Neil

Neil Truby wrote: > No doubt the real answer is RTFM. But, can anyone give me or point me > to a good description of the i/o -wakeup ratio, and why 0.5 is "good"?: > > onstat -g iov -r 5 > IBM Informix Dynamic Server Version 10.00.FC8W2 -- On-Line (Prim) -- > Up 81 days 06:27:37 -- 46892464 Kbytes> > AIO I/O vps: > class/vp s io/s totalops dskread dskwrite dskcopy wakeups io/wup > errors > kio 0 i 41.6 36343 21594 14749 0 57257 0.6 0 > kio 1 i 37.9 33161 13908 19253 0 49383 0.7 0 > kio 2 i 27.8 24334 14429 9905 0 38749 0.6 0 > kio 3 s 33.7 29439 16651 12788 0 46029 0.6 0 > kio 4 i 15.3 13339 7557 5782 0 20654 0.6 0 > kio 5 i 19.5 17059 10091 6968 0 27466 0.6 0 > kio 6 i 0.9 762 100 662 0 798 1.0 0 > kio 7 i 2.0 1721 429 1292 0 2021 0.9 0 > kio 8 i 6.9 6051 3385 2666 0 9600 0.6 0 > kio 9 i 3.2 2788 1128 1660 0 3899 0.7 0 > kio 10 i 1.0 833 63 770 0 930 0.9 0 > kio 11 i 4.3 3768 2346 1422 0 5835 0.6 0 > kio 12 i 11.0 9636 5736 3900 0 15246 0.6 0 > kio 13 i 1.4 1222 230 992 0 1460 0.8 0 > kio 14 i 1.4 1237 131 1106 0 1343 0.9 0 > kio 15 i 1.1 929 194 735 0 1038 0.9 0 > kio 16 i 1.4 1264 220 1044 0 1491 0.8 0 > kio 17 i 2.7 2350 924 1426 0 3004 0.8 0 > kio 18 i 1.0 869 131 738 0 953 0.9 0 > kio 19 i 0.7 625 108 517 0 718 0.9 0 > kio 20 i 0.7 596 166 430 0 696 0.9 0 > kio 21 i 2.3 1990 98 1892 0 1774 1.1 0 > kio 22 i 0.5 416 57 359 0 504 0.8 0 > kio 23 i 0.6 514 58 456 0 650 0.8 0 > kio 24 i 0.3 262 79 183 0 360 0.7 0 > kio 25 i 0.6 500 71 429 0 591 0.8 0 > kio 26 i 0.7 603 26 577 0 614 1.0 0 > kio 27 i 0.2 206 64 142 0 303 0.7 0 > msc 0 i 1.0 863 0 0 0 861 1.0 0 > aio 0 i 0.3 294 98 0 0 294 1.0 0 > aio 1 i 0.0 0 0 0 0 0 0.0 0 > aio 2 i 0.0 0 0 0 0 0 0.0 0 > pio 0 i 0.0 0 0 0 0 0 0.0 0 > lio 0 i 0.0 0 0 0 0 0 0.0 0 > > thx > Neil Well, near to "1" is good - i.e. wake up and do 1 thing. More than 1 would mean that there is a chance that if more resources were available then that "extra bit" could have been done sooner. Less than 1 would mean ... something else :-/ Something like "it was woken up, but not to do any work". Anyways, that output seems to suggest you are running fine as regards I/O, note how your first 5 KIO VPs are taking *most* of the I/O, the others are pretty dormant.

Neil Truby wrote: > No doubt the real answer is RTFM. But, can anyone give me or point me to a > good description of the i/o -wakeup ratio, and why 0.5 is "good"?: It's not "good" per se, it just means that you are doing less than 1 IO every time the IO thread gets fired up, which means that you have a sufficient number of IO threads configured. -- Cheers, Obnoxio The Clown http://obotheclown.blogspot.com -- This message has been scanned for viruses and dangerous content by OpenProtect(http://www.openprotect.com), and is believed to be clean.