IDS Forum

Re: AW: How to check informix DB bottlenecks

Posted By: Art Kagel
Date: Tuesday, 2 March 2010, at 7:02 a.m.

In Response To: Re: AW: How to check informix DB bottlenecks (JACK PAPA)

Haven't done the calculations formally, just eyeballing them, but your RAU
is a bit low ~90% and you are seeing about 7% of your queries running
sequential scans. The latter is a bit high and may indicate missing indexes
or stale data distributions (or may just be that your queries hit lots of
small lookup tables). What are your typical checkpoint times when someone's
complaining?

Art

Art S. Kagel
Advanced DataTools (www.advancedatatools.com)
IIUG Board of Directors (art@iiug.org)

See you at the 2010 IIUG Informix Conference
April 25-28, 2010
Overland Park (Kansas City), KS
www.iiug.org/conf

Disclaimer: Please keep in mind that my own opinions are my own opinions and
do not reflect on my employer, Advanced DataTools, the IIUG, nor any other
organization with which I am associated either explicitly, implicitly, or by
inference. Neither do those opinions reflect those of other individuals
affiliated with any entity with which I am affiliated nor those of the
entities themselves.

On Tue, Mar 2, 2010 at 4:37 AM, JACK PAPA <informix2009@gmail.com> wrote:

> 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.
>
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

--001517402aae331d950480d02233

Messages In This Thread

• How to check informix DB bottlenecks
  JACK PAPA -- Tuesday, 2 March 2010, at 2:22 a.m.
  • AW: How to check informix DB bottlenecks
    Andreas.KUTSCHE@spar.at -- Tuesday, 2 March 2010, at 4:04 a.m.
    • Re: AW: How to check informix DB bottlenecks
      JACK PAPA -- Tuesday, 2 March 2010, at 4:37 a.m.
      • AW: AW: How to check informix DB bottlenecks
        Andreas.KUTSCHE@spar.at -- Tuesday, 2 March 2010, at 5:01 a.m.
      • Re: AW: How to check informix DB bottlenecks
        Art Kagel -- Tuesday, 2 March 2010, at 7:02 a.m.
      • RE: AW: How to check informix DB bottlenecks
        Jack Parker -- Tuesday, 2 March 2010, at 9:00 a.m.
  • Re: How to check informix DB bottlenecks
    Art Kagel -- Tuesday, 2 March 2010, at 6:42 a.m.
    • Re: How to check informix DB bottlenecks
      JACK PAPA -- Tuesday, 2 March 2010, at 9:26 p.m.
      • Re: How to check informix DB bottlenecks
        Art Kagel -- Tuesday, 2 March 2010, at 9:53 p.m.
      • RE: How to check informix DB bottlenecks
        Jack Parker -- Tuesday, 2 March 2010, at 9:54 p.m.
        • AW: How to check informix DB bottlenecks
          Andreas.KUTSCHE@spar.at -- Wednesday, 3 March 2010, at 4:01 a.m.
      • AW: How to check informix DB bottlenecks
        Andreas.KUTSCHE@spar.at -- Wednesday, 3 March 2010, at 3:57 a.m.
      • RE: How to check informix DB bottlenecks
        Wyza, Jonathon -- Wednesday, 3 March 2010, at 8:41 a.m.

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