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Our clients recently has migrated their system to AIX 5.3. Since the
migration they are having problem with our application. It is a
memory leak reported by Informix command 'onstst -g ses'. The memory
allocated to our processes grows until it crashes the system. This is
an example of onstat right after system startup:

IBM Informix Dynamic Server Version 9.40.UC7 -- On-Line -- Up
00:14:25 -- 38
144 Kbytes

session #RSAM total
used dyna
mic
id user tty pid hostname threads memory
memory expl
ain
24 informix - 0 - 0 12288
7992 off
23 istadm 1 28638 H50 1 282624
267712 off
22 istadm 1 27608 H50 1 102400
96400 off
21 istadm 1 27866 H50 1 135168
125672 off
20 istadm 1 26838 H50 1 299008
283960 off
19 istadm 1 26322 H50 1 57344
50880 off
17 istadm 1 29670 H50 1 57344
53352 off
9 istadm 1 22962 H50 1 36864
32088 off
3 informix - 0 - 0 12288
9200 off
2 informix - 0 - 0 12288
7992 off

Our main process' PID is 26838. This is the output from onstat just a
few minutes leter:

IBM Informix Dynamic Server Version 9.40.UC7 -- On-Line -- Up
00:32:42 -- 38
144 Kbytes

session #RSAM total
used dyna
mic
id user tty pid hostname threads memory
memory expl
ain
24 informix - 0 - 0 12288
7992 off
23 istadm 1 28638 H50 1 405504
389504 off
22 istadm 1 27608 H50 1 102400
96400 off
21 istadm 1 27866 H50 1 163840
150184 off
20 istadm 1 26838 H50 1 659456
641336 off
19 istadm 1 26322 H50 1 57344
50880 off
17 istadm 1 29670 H50 1 57344
53352 off
9 istadm 1 22962 H50 1 36864
32088 off
3 informix - 0 - 0 12288
9200 off
2 informix - 0 - 0 12288
7992 off

We were able to recreate this on our dev box. We are running AIX 5.3
with latest Service Pack from IBM and Informix IDS 9.40.UC7. We can
run identical application on AIX 5.2 with IDS 9.4 or IDS 9.2 without
any problems. It is only on AIX 5.3. We re-compiled the system with
IDS 10 on AIX 5.3 and we got the memory leak problem.
Does anybody has any suggestions?

Thank you.

Debug malloc's report_allocations

Read up on debug malloc from publib.boulder..


http://publib.boulder.ibm.com/infoce...v5r3/index.jsp

feel free to ping me.. send me a mail, and i'll send you my google
id...

Thanks and regards,
Rajbir Bhattacharjee

mirekb wrote:
> Our clients recently has migrated their system to AIX 5.3. Since the
> migration they are having problem with our application. It is a
> memory leak reported by Informix command 'onstst -g ses'. The memory
> allocated to our processes grows until it crashes the system. This is
> an example of onstat right after system startup:
>
> IBM Informix Dynamic Server Version 9.40.UC7 -- On-Line -- Up
> 00:14:25 -- 38
> 144 Kbytes
>
> session #RSAM total
> used dyna
> mic
> id user tty pid hostname threads memory
> memory expl
> ain
> 24 informix - 0 - 0 12288
> 7992 off
> 23 istadm 1 28638 H50 1 282624
> 267712 off
> 22 istadm 1 27608 H50 1 102400
> 96400 off
> 21 istadm 1 27866 H50 1 135168
> 125672 off
> 20 istadm 1 26838 H50 1 299008
> 283960 off
> 19 istadm 1 26322 H50 1 57344
> 50880 off
> 17 istadm 1 29670 H50 1 57344
> 53352 off
> 9 istadm 1 22962 H50 1 36864
> 32088 off
> 3 informix - 0 - 0 12288
> 9200 off
> 2 informix - 0 - 0 12288
> 7992 off
>
> Our main process' PID is 26838. This is the output from onstat just a
> few minutes leter:
>
> IBM Informix Dynamic Server Version 9.40.UC7 -- On-Line -- Up
> 00:32:42 -- 38
> 144 Kbytes
>
> session #RSAM total
> used dyna
> mic
> id user tty pid hostname threads memory
> memory expl
> ain
> 24 informix - 0 - 0 12288
> 7992 off
> 23 istadm 1 28638 H50 1 405504
> 389504 off
> 22 istadm 1 27608 H50 1 102400
> 96400 off
> 21 istadm 1 27866 H50 1 163840
> 150184 off
> 20 istadm 1 26838 H50 1 659456
> 641336 off
> 19 istadm 1 26322 H50 1 57344
> 50880 off
> 17 istadm 1 29670 H50 1 57344
> 53352 off
> 9 istadm 1 22962 H50 1 36864
> 32088 off
> 3 informix - 0 - 0 12288
> 9200 off
> 2 informix - 0 - 0 12288
> 7992 off
>
> We were able to recreate this on our dev box. We are running AIX 5.3
> with latest Service Pack from IBM and Informix IDS 9.40.UC7. We can
> run identical application on AIX 5.2 with IDS 9.4 or IDS 9.2 without
> any problems. It is only on AIX 5.3. We re-compiled the system with
> IDS 10 on AIX 5.3 and we got the memory leak problem.
> Does anybody has any suggestions?
>
> Thank you.