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IDS Forum

AW: AW: AW: AW: Analysis of activities during ....

Posted By: Andreas.KUTSCHE@spar.at
Date: Friday, 4 July 2008, at 6:31 a.m.

In Response To: Re: AW: AW: AW: Analysis of activities during chec (VARTIKA AGRAWAL)

Hi,

you are using KAIO !!! You see the kio rows in the onstat -g iov output only when using KAIO. Therefore NUMAIOVPS = 2 is Okay (and you won't see any performance impacts when changing it).

As I suggested you can try to lower the threshold value for the BTREESCANNERS - but it is not sure if it helps.

AUSP looks like an ever changing table - I think you have to recreate the indexes to avoid the long checkpoints.

We don't use table AUSP (only a few rows) - but if you want you can send me
your dbschema -ss and oncheck -pt for your AUSP and I will compare it to some of our problem tables (BDCPS in SAP or some special tables in non-SAP applications).

Regards,
Andreas

>
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-------------------------------------------
-----Ursprüngliche Nachricht-----

> Von: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] Im Auftrag von
> VARTIKA AGRAWAL
> Gesendet: Freitag, 04. Juli 2008 11:56
> An: ids@iiug.org
> Betreff: Re: AW: AW: AW: Analysis of activities during .... [12580]
>
> Hi Andreas,
>
> I am very comfortable with index creation and re-org and as you've
> suggested
> we always carry out this activity in a replica system but the main problem
> is
> down-time. It is very difficult to get.
>
> So far I have not changed the number of NUMAIOVPS ('coz response time is
> ok).
> I remember doing (adding more aio vp) it some time back but if we bounce
> the
> engine then does the onconfig value take effect?
>
> Here IDS is supporting a 46B sap system and the table is 'AUSP' and the
> view
> thru which the data is being inserted in 'AUSPC_V' and the tx is
> 'COR1'(Create
> Process Order) and I am getting this error(hang INSERTS) for a particular
> plant only.
>
> DB10:informix 7% onstat -g iov
>
> IBM Informix Dynamic Server Version 9.40.FC5XF -- On-Line -- Up 18 days
> 16:18:27 -- 22365184 Kbytes
>
> AIO I/O vps:
> class/vp s io/s totalops dskread dskwrite dskcopy wakeups io/wup errors
> kio 0 s 238.7 2404808 2354239 50569 0 2589362 0.9 0
> kio 1 i 254.4 2562937 2500563 62374 0 2408117 1.1 0
> kio 2 i 496.3 4999949 4914595 85354 0 4089601 1.2 0
> kio 3 s 439.2 4425182 4346452 78730 0 3666591 1.2 0
> kio 4 i 477.3 4809050 4724907 84143 0 3962964 1.2 0
> kio 5 i 435.2 4384475 4305841 78634 0 3652704 1.2 0
> kio 6 i 482.2 4858517 4774440 84077 0 4041864 1.2 0
> kio 7 s 462.8 4662417 4577347 85070 0 3878042 1.2 0
> kio 8 i 477.1 4806317 4720109 86208 0 4005377 1.2 0
> kio 9 s 467.5 4710228 4624100 86128 0 3925564 1.2 0
> kio 10 i 495.7 4994114 4904213 89901 0 4144201 1.2 0
> kio 11 i 465.4 4689265 4606013 83252 0 3941849 1.2 0
> kio 12 i 490.5 4942005 4854413 87592 0 4145739 1.2 0
> kio 13 i 476.3 4799193 4712997 86196 0 4019736 1.2 0
> kio 14 i 492.9 4965623 4878046 87577 0 4176744 1.2 0
> kio 15 s 455.3 4587474 4506650 80824 0 3873520 1.2 0
> kio 16 i 487.9 4915399 4825349 90050 0 4130260 1.2 0
> kio 17 s 465.6 4691319 4604464 86855 0 3964030 1.2 0
> kio 18 i 478.0 4815681 4729854 85827 0 4067140 1.2 0
> kio 19 i 487.2 4908883 4820755 88128 0 4131455 1.2 0
> kio 20 i 512.3 5161707 5068993 92714 0 4350075 1.2 0
> kio 21 i 477.1 4806284 4722302 83982 0 4087566 1.2 0
> kio 22 i 475.8 4793793 4704636 89157 0 4118026 1.2 0
> kio 23 i 510.3 5141346 5048785 92561 0 4342563 1.2 0
> kio 24 i 517.3 5211428 5118536 92892 0 4404450 1.2 0
> kio 25 i 479.3 4829143 4741694 87449 0 4135415 1.2 0
> kio 26 i 522.1 5259664 5166589 93075 0 4464259 1.2 0
> kio 27 i 472.7 4762246 4675624 86622 0 4058204 1.2 0
> kio 28 i 493.8 4975240 4887793 87447 0 4231049 1.2 0
> kio 29 i 540.7 5447501 5348881 98620 0 4663363 1.2 0
> kio 30 i 519.7 5236453 5146948 89505 0 4477662 1.2 0
> kio 31 s 470.1 4736726 4651697 85029 0 4083221 1.2 0
> kio 32 i 486.8 4904118 4817193 86925 0 4248903 1.2 0
> kio 33 i 494.6 4983023 4893916 89107 0 4265053 1.2 0
> kio 34 i 521.9 5258301 5163651 94650 0 4475629 1.2 0
> kio 35 i 526.2 5301896 5208327 93569 0 4541526 1.2 0
> kio 36 i 496.1 4998220 4909563 88657 0 4257202 1.2 0
> kio 37 i 489.4 4930951 4843299 87652 0 4257872 1.2 0
> kio 38 i 514.6 5184693 5094258 90435 0 4448206 1.2 0
> msc 0 i 0.1 1326 0 0 0 1323 1.0 0
> aio 0 i 0.0 330 110 0 0 330 1.0 0
> aio 1 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
>
> Regards,
> Vartika Agrawal
>
>
> **************************************************************************
> *****
> Forum Note: Use "Reply" to post a response in the discussion forum.

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