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IDS Forum

Re: Waits in database

Posted By: Andreas Legner
Date: Tuesday, 17 January 2017, at 5:33 a.m.

In Response To: Waits in database (HUGO PADILLA)

These are buffer waits (B flag), and 1440e1440 consequently is a buffer's=20
address.

Possibly a hot index root node?

onstat -b | egrep "<that=5Faddress>|address"

-> use 'pagenum' information to find out which page this is=20
(chunk=5Fnum:chunk=5Foffsset)

-> find out which dbspace this chunk belongs to

-> use 'oncheck -pe <dbspace>' to identify which 'object'=20
(table/index) the page belongs to

-> use 'oncheck -pt <db>:<table>' to determine which precise=20
partition and logical page

Now you know which data it is that's so being waited on - from there you =

can find out possible reasons.

HTH,
Andreas

From: "HUGO PADILLA" <hugo=5Fpadilla@terra.com.mx>
To: ids@iiug.org
Date: 12.01.2017 20:02
Subject: Waits in database [38509]
Sent by: ids-bounces@iiug.org

Greetings=20

I have a degradation in a IDS 11.50.=20

With onstat -u I detect a lot of waits in a resource, but I cant identity=20
wich=20
user causes this=20

The output is:=20
/informix/ids1150 [casiopea2] (informix): onstat -u | egrep 1440=20
2bdde5ba8 B--PX-- 944923 masiste - 1440e1440 0 0 303091 5189=20
2e0149e80 ---P--- 922478 masiste - 1440e1440 0 2 370541 13209=20
2e0152400 B--PX-- 923513 masiste WVMXAMUL 1440e1440 0 4 5531 1065=20
2e0153d08 B--PX-- 932984 masiste XMZ7129- 1440e1440 0 4 98173 964=20
2e0154db8 B--PX-- 918964 masiste MA14613- 1440e1440 0 4 46258 0=20
316c6d380 B--PX-- 1004916 masiste - 1440e1440 0 0 136069 11762=20
316c782b8 B--PX-- 923071 masiste MA00296P 1440e1440 0 3 26950 17661=20
316c91b90 ---P--- 1032894 masiste WVMXAMUL 1440e1440 0 2 161 0=20
316c97758 B--PX-- 1001928 masiste - 1440e1440 0 0 103790 9780=20
34ae94158 B--PX-- 1036188 masiste - 1440e1440 0 3 1134 0=20
34ae9c6d8 B--PX-- 1001968 masiste - 1440e1440 0 0 60741 19712=20
34aea5d08 B--PX-- 1038729 masiste - 1440e1440 0 3 1 0=20
34aeaf338 B--PX-- 1032877 masiste SEG048 1440e1440 0 4 70043 0=20
34aeb35f8 B---X-- 696956 masiste ASISTEVA 1440e1440 0 0 0 0=20
393c62f60 B--PX-- 1037700 masiste MA00757- 1440e1440 0 0 4374 0=20
393c82c58 B--PX-- 1009251 masiste ALEOROZC 1440e1440 0 0 351 0=20
393c915f8 B--PX-- 1034495 masiste WVMXAMUL 1440e1440 0 0 8995 1255=20
3e25ce6a8 B--PX-- 1038767 masiste POLIZARI 1440e1440 0 3 3 0=20
3e25d2110 B--PX-- 1029623 masiste - 1440e1440 0 0 331042 89529=20
4542b2cf0 B--PX-- 1004890 masiste - 1440e1440 0 0 102862 4912=20
49df37640 B--PX-- 916702 masiste - 1440e1440 0 4 769602 9768=20
49df38f48 B--PX-- 1005236 masiste XMBX096 1440e1440 0 0 2184 0=20
49df3b900 B--PX-- 1038225 masiste - 1440e1440 0 0 23 0=20
/informix/ids1150 [casiopea2] (informix):=20

How Can I dentify the user o resource=20

Thanks a lot=20

***************************************************************************=
****=20

Forum Note: Use "Reply" to post a response in the discussion forum.=20

Messages In This Thread

  • Waits in database
    HUGO PADILLA -- Thursday, 12 January 2017, at 2:01 p.m.
    • Re: Waits in database
      Art Kagel -- Thursday, 12 January 2017, at 2:37 p.m.
    • Re: Waits in database
      Andreas Legner -- Tuesday, 17 January 2017, at 5:33 a.m.

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