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IDS 11.10 - 30 Sep 2012
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IDS Forum

IDS v11.10 hang: no error / logicalLog not full

Posted By: STEVE DELEIGNIES
Date: Friday, 29 October 2010, at 9:12 a.m.

Hello,

I am supporting an application running on Informix (IDS v11.10UC3) and sometimes the Informix database hung. Please find below the symptoms:
- The onstat commands are still running but not the commands dbaccess, onmonitor...
- there is no error log in the online.log or console messages.
- Server continues to perform checkpoints on database, but there is no longer console message.
- command 'onmode -kuy' is not responding, need to manually kill the oninit adm process.

I am not an Informix expert but I did some investigations and here are my conclusions:
- the logicalLogs are not full because the old logicalLogs are correctly backed up, so they can be reused (see onstat -l below)
- no thread lock on database: there are two userThreads waiting but it seems to be normal:

sid 25 is waiting a network connection to execute query

sid 18 is an informix thread waiting "bp_cond bf_priosweep" (I read somewhere it is a normal state for IDS)

Could someone help ?
Thanks,
steve

address number flags uniqid begin size used %used
2d2ce5b0 7 U-B---- 8908 3:53 20000 20000 100.00
2d2ce5f8 8 U-B---- 8909 3:20053 20000 20000 100.00
2d2ce640 9 U-B---- 8910 3:40053 20000 20000 100.00
2d2ce688 10 U-B---- 8911 3:60053 20000 20000 100.00
2d2ce6d0 11 U-B---- 8912 3:80053 20000 20000 100.00
2d2ce718 12 U-B---- 8913 3:100053 20000 20000 100.00
2d2ce760 13 U-B---- 8914 3:120053 20000 20000 100.00
2d2ce7a8 14 U-B---- 8915 3:140053 20000 20000 100.00
2d2ce7f0 15 U-B---- 8916 3:160053 20000 20000 100.00
2d2ce838 16 U---C-L 8917 3:180053 20000 19766 98.83
2d2ce880 17 U-B---- 8895 3:200053 20000 20000 100.00
2d2ce8c8 18 U-B---- 8896 3:220053 20000 20000 100.00
2d2ce910 19 U-B---- 8897 3:240053 20000 20000 100.00
2d2ce958 20 U-B---- 8898 3:260053 20000 20000 100.00
2d2ce9a0 21 U-B---- 8899 3:280053 20000 20000 100.00
2d2ce9e8 22 U-B---- 8900 3:300053 20000 20000 100.00
2d2cea30 23 U-B---- 8901 3:320053 20000 20000 100.00
2d2cea78 24 U-B---- 8902 3:340053 20000 20000 100.00
2d2ceac0 25 U-B---- 8903 3:360053 20000 20000 100.00
2d2ceb08 26 U-B---- 8904 3:380053 20000 20000 100.00
2d2ceb50 27 U-B---- 8905 3:400053 20000 20000 100.00
2d2ceb98 28 U-B---- 8906 3:420053 20000 20000 100.00
2d2cebe0 29 U-B---- 8907 3:440053 20000 20000 100.00
23 active, 23 total

Userthreads
address flags sessid user tty wait tout locks nreads nwrites
2d28e018 ---P--D 1 informix - 0 0 0 87 844
2d28e5f0 ---P--F 0 informix - 0 0 0 0 45550
2d28ebc8 ---P--F 0 informix - 0 0 0 0 8827
2d28f1a0 ---P--F 0 informix - 0 0 0 0 215
2d28f778 ---P--F 0 informix - 0 0 0 0 0
2d28fd50 ---P--F 0 informix - 0 0 0 0 0
2d290328 ---P--F 0 informix - 0 0 0 0 0
2d290900 ---P--F 0 informix - 0 0 0 0 0
2d290ed8 ---P--F 0 informix - 0 0 0 0 0
2d2914b0 ---P--- 9 informix - 0 0 0 0 0
2d291a88 ---P--B 10 informix - 0 0 0 204 128
2d292060 Y--P--- 25 myAppli - 2dec44e8 0 1 134 539
2d292638 ---PR-- 21 informix - 0 0 2 507 28
2d292c10 ---P--D 13 informix - 0 0 0 0 0
2d2931e8 Y--P--D 18 informix - a3c7008 0 0 0 0
2d2937c0 ---P--- 20 informix - 0 0 1 251 2
2d293d98 ---P--- 22 informix - 0 0 2 1518 270
17 active, 128 total, 25 maximum concurrent

Conditions with waiters:
cid addr name waiter waittime
....
657 2dec44e8 netnorm 57 39946
626 a3c7008 bp_cond 49 158
...

Threads
tid tcb rstcb prty status vp-class name
...
57 2db9dc18 2d292060 1 cond wait netnorm 1cpu sqlexec
49 2dc44d40 2d2931e8 1 cond wait bp_cond 4cpu bf_priosweep
...

Locks
address wtlist owner lklist type tblsnum rowid key#/bsiz
a5dd908 0 2d2937c0 0 HDR+S 100002 209 0
a5dd968 0 2d292060 0 HDR+S 100002 201 0
ab96688 0 2d292638 0 S 100002 209 0
ab96748 0 2d292638 ab96688 HDR+S 100002 207 0
ab96868 0 2d293d98 0 S 100002 209 0
ab968c8 0 2d293d98 ab96868 S 100002 207 0
6 active, 250000 total, 65536 hash buckets, 0 lock table overflows

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