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IDS Forum
AW: AW: How to check informix DB bottlenecks
Posted By: Andreas.KUTSCHE@spar.at
Date: Tuesday, 2 March 2010, at 5:01 a.m.
In Response To: Re: AW: How to check informix DB bottlenecks (JACK PAPA)
Hi,
your onstat -p shows a buffer cache hit rate (%cached) of 45.79 .
An OLTP system should show values above 90%.
Maybe your buffer cache is way too small ?
How many memory does your machine have ? How many is free ?
What is the value of onconfig parameter BUFFERS ?
You may have a look at the user sessions with high nread values:
onstat -u | grep user | sort -n -k 9
After that do indiviual
Onstat -g sql <sid> or onstat -g ses <sid>
with the session sid from column 3 for the last sessions.
If the sessions are activ for a long time (and you don't reset statistics with onstat -z regularly) they show accumulated values.
Bye
Andreas
>
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-----Ursprüngliche Nachricht-----
> Von: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] Im Auftrag von
> JACK PAPA
> Gesendet: Dienstag, 2. März 2010 10:37
> An: ids@iiug.org
> Betreff: Re: AW: How to check informix DB bottlenecks [19151]
>
> I am using IDS 9.4, AIX 5.4.
>
> onstat -p shows
>
> => onstat -p
>
> IBM Informix Dynamic Server Version 9.40.UC6 -- On-Line (Prim) -- Up 23
> days
> 15:06:08 -- 2251504 Kbytes
>
> Profile
> dskreads pagreads bufreads %cached dskwrits pagwrits bufwrits %cached
> 1220612817 3198664750 2251555606 45.79 34109654 100095460 2062133360 98.35
>
> isamtot open start read write rewrite delete commit rollbk
> 2936740675 208936934 1093068317 2477580096 1270145450 25498127 26444677
> 3868723 1868
>
> gp_read gp_write gp_rewrt gp_del gp_alloc gp_free gp_curs
> 0 0 0 0 0 0 0
>
> ovlock ovuserthread ovbuff usercpu syscpu numckpts flushes
> 0 0 0 723695.11 86056.10 8699 17400
>
> bufwaits lokwaits lockreqs deadlks dltouts ckpwaits compress seqscans
> 51876197 7247 1280409663 57 0 12432 6247517 15715161
>
> ixda-RA idx-RA da-RA RA-pgsused lchwaits
> 85766244 103708265 208434932 366985387 3557149
>
> -------------------------
> This is the onstat -u output.
>
> 90291c30 ---P--- 12 informix - 0 0 0 0 34
> 90292248 ---P--B 13 informix - 0 0 0 392183594 777296
> 90292860 Y--P--D 15 informix - 908b4540 0 0 30027 8701
> 90292e78 ---P--D 35290 informix - 0 0 0 0 0
> 90293490 ---P--D 35289 informix - 0 0 0 0 0
> 902946d8 ---P--D 20 informix - 0 0 0 0 8
> 90295308 Y--P--- 25 patrol - 913b0a18 0 16 54299002 1142837
> 90295920 Y--P--D 26 informix - 4008f12c 0 0 0 0
> 90296550 Y-AP--M 106804 informix - 93b6a888 0 0 29 24
> 90297180 Y--P--- 106500 user1 0 93968f18 0 1 6 79
> 902983c8 Y--P--- 105021 user1 Server01 984162a0 0 1 396 285
> 90299c28 Y--P--- 102768 user1 Server01 936296f8 0 1 0 151
> 9029a240 Y--P--- 76613 user001 - 92c7ba18 0 2 808003 0
> 9029eb60 Y--P--- 76570 user001 - 93b51d38 0 1 1717 588
> 902a1c20 Y--P--- 103621 user1 Server01 931bb798 0 1 0 12
> 902a2e68 Y--P--- 106557 user001 - 9242afb8 0 1 51 0
> 902a6540 Y-AP--M 106805 informix - 96892ba8 0 0 26 24
> 902a7da0 Y--P--- 2788 user1 0 94821068 0 1 7706567 1542817
> 902a89d0 Y--P--- 2789 user1 0 9397b158 0 1 1552 57902
> 902a9600 Y--P--- 2776 user1 Server04 9398e068 0 1 11094 125827
> 93302018 Y--P--- 2781 user1 Server04 9155d9e0 0 1 0 0
> 933044a8 Y--P--- 20454 user1 0 931a5fc8 0 2 39585 2843
> 93304ac0 Y--P--- 105783 user1 Server01 937422e8 0 1 1262 674
> 93306320 Y--P--- 106798 user1 0 93bb4b58 0 1 2 95
> 93307568 Y--P--- 103615 user1 Server01 93a55fb8 0 1 299 217
> 93307b80 Y--P--- 106131 user1 Server01 9364ed88 0 1 69 1482
> 9330a010 Y--P--- 105251 user1 0 936ad608 0 1 1 1
> 9330b870 Y--P--- 106481 user1 Server01 9c11d658 0 1 0 40
> 9330d6e8 Y--P--- 106384 user1 Server01 92cb7ce0 0 1 2811 2612
> 9330f560 Y--P--- 106748 user1 Server01 93aa03d8 0 1 0 34
> 9330fb78 Y--P--- 106795 user1 0 930b1bf8 0 4 10345 809
> 93312620 Y-AP--M 106803 informix - 92139d38 0 0 27 24
> 93313e80 Y--P--- 106540 user001 - 939b39c8 0 1 67 0
> 933150c8 Y--P--- 99281 user1 0 9efd4478 0 1 1 17
> 933156e0 Y--P--- 99279 user1 0 9c9158d8 0 2 1 1
> 93315cf8 Y--P--- 106547 user001 - 91c43428 0 1 623 588
> 93316928 Y--P--- 104952 user1 Server01 9c012108 0 1 808 670
> 93316f40 Y--P--- 21824 user1 Server02 93943928 0 1 0 0
> 93317b70 Y--P--- 70141 user002 - 935cbf68 0 1 61964 4102
> 933193d0 Y--P--- 104992 user1 0 9378f798 0 1 0 1
> 9331ac30 Y--P--- 101838 user1 Server01 91271338 0 1 26147 7592
> 9331c490 ------- 106803 informix - 0 0 0 0 0
> 9331caa8 Y--P--- 101997 user1 Server01 92de41f8 0 1 2836 2608
> 9331e920 Y--P--- 41847 user1 0 93876e28 0 4 46627 3466
> 9331ef38 ------- 106807 informix - 0 0 0 298 0
> 933219e0 Y--P--- 106639 user1 0 9377a1a8 0 1 5 3
> 93321ff8 ------- 106812 informix - 0 0 0 298 0
> 93322610 Y--P--- 104990 user1 0 937a94c8 0 2 5 1
> 93322c28 Y--P--- 102590 user1 Server01 93c14298 0 1 0 0
> 93323e70 Y--P--- 105250 user1 Server68 938be978 0 1 0 0
> 93324aa0 Y--P--- 103041 user1 0 93884608 0 1 304442 75051
> 933250b8 Y--P--- 106136 user001 - 92de4b58 0 2 44 0
> 93326300 Y--P--- 104816 user1 Server01 9afb0428 0 1 829 205
> 9332c480 ------- 106811 informix - 0 0 0 0 0
> 9332d0b0 Y--P--- 76578 user001 - 9f9f7338 0 1 785 588
> 93330788 Y--P--- 106711 user1 0 9369a518 0 1 9 26
> 97e90e90 Y--P--- 106556 user001 - 93b51338 0 1 629 588
> 97e92d08 Y--P--- 103382 user1 0 939d8338 0 3 6956 226
> 97e93938 Y-AP--M 106812 informix - 93b37658 0 0 26 24
> 97e94568 Y--P--- 106546 user001 - 98496568 0 1 6 0
> 97e95dc8 Y--P--- 106210 user1 Server01 9c333ab8 0 1 0 43
> 97e98e88 Y--P--- 101889 user1 Server01 93a235b8 0 1 137 178
> 97e9b930 Y--P--- 100041 user1 0 937d4d88 0 1 5691 109
> 97e9cb78 Y--P--- 105010 user001 - 93848248 0 1 3934 1708
> 97e9d190 Y--P--- 104993 user1 Server69 93943978 0 1 0 0
> 97e9d7a8 Y--P--- 105244 user1 0 93867518 0 2 3 1
> 97e9e3d8 Y--P--- 76573 user001 - 936f7e78 0 1 76 0
> 97e9e9f0 Y--P--- 106582 user1 0 9f124a68 0 1 6 4
> 97ea0868 Y-AP--M 106808 informix - 93ab33d8 0 0 27 24
> 97ea26e0 ------- 106804 informix - 0 0 0 5 0
> 97ea3310 Y--P--- 70711 user003 Server12 93593dd8 0 1 18318 0
> 97ea3928 Y--P--- 106548 user001 - 93c6d838 0 1 12 0
> 97ea3f40 Y-AP--M 106807 informix - 930e0018 0 0 27 24
> 97ea5db8 Y--P--- 106209 user1 Server01 93c01068 0 1 181 185
> 97ea63d0 Y-AP--M 106811 informix - 9242a158 0 0 27 24
> 97eaa0c0 Y--P--- 20457 user1 0 93a11888 0 1 259723 1105
> 97eab308 Y-AP--M 106810 informix - 9b9b3298 0 0 27 24
> 97eab920 Y--P--- 104953 user1 Server01 937e3978 0 1 0 51
> 97eac550 Y--P--- 106560 user1 0 9171be28 0 2 247 137
> 97eae3c8 Y--P--- 103642 user1 Server01 9d62dc98 0 1 669 408
> 97eb0e70 Y--P--- 106387 user1 Server01 93c5fbf8 0 1 0 54
> 97eb1488 ------- 106806 informix - 0 0 0 304 0
> 97eb2ce8 ------- 106804 informix - 0 0 0 0 0
> 97eb3300 Y--P--- 103643 user1 Server01 93a11518 0 1 0 2
> 97eb7608 ------- 106808 informix - 0 0 0 298 0
> 97eba6c8 Y--P--- 101797 user1 Server01 939a0ce8 0 1 0 296
> 97ebbf28 Y--P--- 106545 user001 - 935de608 0 1 624 588
> 97ebd788 Y--P--- 76610 user001 - 93c27478 0 1 8037 2268
> 97ebefe8 ------- 106811 informix - 0 0 0 298 0
> 99b19c48 Y--P--- 106552 user001 - 9f40e928 0 1 620 588
> 99b1ae90 Y--P--- 101839 user1 Server01 9381d798 0 1 0 192
> 99b1b4a8 Y--P--- 71661 user003 Server12 9f4459c8 0 1 27579 0
> 99b1d938 Y--P--- 106553 user001 - 93c396a8 0 1 63 0
> 99b1fdc8 ------- 106806 informix - 0 0 0 0 96
> 99b21628 Y--P--- 104918 user001 - 936adce8 0 1 3964 1148
> 99b21c40 Y--P--- 102962 user1 0 93857928 0 1 61 3672
> 99b25318 Y--P--- 99276 user1 Server96 937b8388 0 1 0 0
> 99b25930 Y--P--- 86450 user1 0 9398e478 0 1 68882 251
> 99b26b78 Y--P--- 106369 user1 Server01 93aa0e78 0 1 0 0
> 99b277a8 Y--P--- 101892 user1 Server01 933980b8 0 1 0 0
> 99b27dc0 Y--P--- 82213 user001 - 9f545018 0 2 6172 0
> 99b283d8 Y--P--- 73755 user003 Server10 938393d8 0 1 16090 0
> 99b2a868 Y--P--- 105011 user001 - 9379b658 0 2 82569 0
> 99b2c0c8 Y--P--- 106791 user1 Server01 936e5338 0 1 48 122
> 99b2c6e0 ------- 106805 informix - 0 0 0 3 0
> 99b2e558 Y--P--- 103724 user1 Server01 9afb0928 0 1 56 27
> 99b2eb70 Y--P--- 105826 user1 0 930e0738 0 3 2059 198
> 99b2f188 Y--P--- 85998 user002 - 937c6bf8 0 1 25882 2218
> 99b309e8 Y--P--- 86447 user1 0 939d8658 0 2 26812 601
> 99b31000 Y--P--- 106561 user1 0 9377a478 0 1 6 4
> 99b32248 Y--P--- 102872 user1 Server05 936adb08 0 1 0 0
> 99b34cf0 Y--P--- 103725 user1 Server01 9c74ea18 0 1 0 6
> 99b35308 Y--P--- 106135 user001 - 9379bab8 0 1 2882 1148
> 99b35920 Y--P--- 106792 user1 Server01 9314c8d8 0 1 0 6
> 99b36b68 Y--P--- 102767 user1 Server01 935cb658 0 1 1789 990
> 99b37180 Y--P--- 104666 user1 Server01 9f8c04c8 0 1 0 0
> 99b37db0 Y--P--- 106538 user001 - 936d2978 0 1 640 588
> 99b39610 Y--P--- 105253 user1 Server68 9379b8d8 0 1 0 0
> 99b3cce8 Y--P--- 102416 user1 Server01 9b90f108 0 1 0 18
> 99b3d300 Y-AP--M 106780 informix - 918e4428 0 1 59 26
> 99b42e68 ------- 106805 informix - 0 0 0 0 0
> 99b43a98 Y--P--- 106747 user1 Server01 92139748 0 1 145 302
> 99b440b0 Y--P--- 105312 user1 0 9f9b0ce8 0 3 9406 733
> 99b45f28 ------- 106807 informix - 0 0 0 0 0
> 99b46b58 Y--P--- 102871 user1 Server11 93a11fb8 0 1 378 6738
> 99b47170 Y--P--- 102671 rbisn00 3 93956748 0 1 101 0
> 99b489d0 Y--P--- 104665 user1 Server01 939fece8 0 1 96 80
> 9cceb6f0 Y--P--- 41857 user1 0 93c27338 0 1 205145 1058
> 9ccec320 Y--P--- 106480 user1 Server01 9481f3d8 0 1 320 971
> 9cced568 Y--P--- 106201 user1 Server01 93b51ec8 0 1 1798 1191
> 9ccee7b0 ------- 106808 informix - 0 0 0 0 0
> 9cceedc8 Y--P--- 103384 user1 0 9380e1f8 0 1 6467 34
> 9ccef3e0 Y--P--- 105484 user1 Server01 9fbb8018 0 1 0 0
> 9ccf1e88 Y--P--- 104980 user1 Server69 98a15b08 0 1 9 0
> 9ccf36e8 Y--P--- 102960 user1 0 9fbb8a18 0 1 380883 83313
> 9ccf67a8 Y--P--- 82202 user001 - 93a8d9c8 0 1 4663 1708
> 9ccf73d8 Y--P--- 99271 user1 Server96 93c27928 0 1 0 0
> 9ccf79f0 Y--P--- 105483 user1 Server01 9e250ce8 0 1 279 187
> 9ccf9250 Y-AP--M 106809 informix - 9371d658 0 0 26 24
> 9ccf9e80 Y--P--- 105827 user1 0 9cd89748 0 1 20 69
> 9ccfaab0 ------- 106810 informix - 0 0 0 298 0
> 9ccfcf40 Y--P--- 105605 user1 Server01 9363b4c8 0 1 0 8
> 9ccfdb70 ------- 106812 informix - 0 0 0 0 0
> 9ccfe188 ------- 106809 informix - 0 0 0 0 0
> 9ccff9e8 Y--P--- 106496 user1 0 91271388 0 2 2579 1161
> 9cd00618 Y--P--- 100038 user1 0 9c3338d8 0 3 44874 554
> 9cd01e78 Y--P--- 106627 user1 Server01 9377af18 0 1 18 88
> 9cd036d8 ------- 106809 informix - 0 0 0 298 0
> 9cd04308 Y--P--- 104937 user1 Server01 9c3abe28 0 1 0 0
> 9cd04920 Y--P--- 76580 user001 - 93661f18 0 1 64 0
> 9cd05550 ------- 106803 informix - 0 0 0 4 0
> 9cd06180 Y--P--- 106202 user1 Server01 9c72e298 0 1 0 73
> 9cd06798 Y--P--- 21822 user1 Server02 93398bf8 0 1 7071 71595
> 9cd073c8 Y--P--- 106628 user1 Server01 938f70b8 0 1 0 2
> 9cd08c28 ------- 106810 informix - 0 0 0 0 0
> 9cd0b6d0 Y--P--- 106272 user004 7 939fe478 0 1 222495 0
> 9cd0cf30 Y--P--- 105324 user1 0 939a0bf8 0 1 11259 27
> 9cd0f9d8 Y--P--- 106368 user1 Server01 933e31a8 0 1 1001 424
> 9cd11850 Y--P--- 105022 user1 Server01 9b9b37e8 0 1 0 5
> 9cd12a98 Y-AP--M 106806 informix - 9318edd8 0 0 38 24
> 9cd136c8 Y--P--- 106708 user1 0 9371d978 0 4 9617 298
> 9cd13ce0 Y--P--- 101998 user1 Server01 9b370158 0 1 0 50
> 9cd15540 Y--P--- 102413 user1 Server01 93bc7568 0 1 2921 1713
> 9cd16da0 Y--P--- 105005 user001 - 9be45a18 0 2 292 18
> 9cd173b8 Y--P--- 106578 user1 0 927f71f8 0 2 1516 1080
> a1312018 Y--P--- 101796 user1 Server01 93ad8bf8 0 1 2156 2477
> a1312c48 Y--P--- 103042 user1 0 930b16a8 0 1 89 2889
> a13144a8 Y--P--- 102589 user1 Server01 91c43c98 0 1 694 161
> a13150d8 Y--P--- 103616 user1 Server01 933584c8 0 1 0 7
> a13156f0 Y--P--- 76572 user001 - 9377a018 0 1 0 0
> a1315d08 Y--P--- 105784 user1 Server01 91c43388 0 1 0 103
> a1316320 Y--P--- 106636 user1 0 9fb54ce8 0 7 198 63
> a1317568 Y--P--- 103620 user1 Server01 9f949d38 0 1 4450 2320
> a1317b80 Y--P--- 104817 user1 Server01 9364e8d8 0 1 0 12
> a13193e0 Y--P--- 106132 user1 Server01 97cb4fb8 0 1 0 111
> a131a010 Y--P--- 104936 user1 Server01 9f8c43d8 0 1 4860 13913
> a131b258 Y--P--- 89712 user005 2 93b57bf8 0 1 968 84
> a131c4a0 Y--P--- 105604 user1 Server01 93c14248 0 1 1899 1001
>
> I can't post the onstat -g sql 0 output as it's too long.
>
>
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