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MQSeries.net Forum Index » IBM MQ Installation/Configuration Support » EXTSHM property for MQ

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vmcgloin
PostPosted: Mon Jan 18, 2010 1:35 am    Post subject: Reply with quote

Knight

Joined: 04 Apr 2002
Posts: 560
Location: Scotland

| LVLS :- 6.0.2.1 |

I an pretty sure this line means that you actually have fixpack 1 for 6.0.2 not fixpack 3 installed which might explain why you are still seeing these FDC's.
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manojsu
PostPosted: Mon Jan 18, 2010 1:49 am    Post subject: Reply with quote

Centurion

Joined: 19 Jul 2006
Posts: 147
Location: Bangalore

My Mistake.. The snapshot is before the upgrade
Put the wrong FDC snap shot..

WebSphere MQ First Failure Symptom Report |
| ========================================= |
| |
| Date/Time :- Sunday January 17 22:17:27 GMT 2010 |
| Host Name :- beirut (AIX 5.3) |
| PIDS :- 5724H7201 |
| LVLS :- 6.0.2.3 |
| Product Long Name :- WebSphere MQ for AIX |
| Vendor :- IBM |
| Probe Id :- XY129037 |
| Application Name :- MQM |
| Component :- xstConnectExtent |
| SCCS Info :- lib/cs/unix/amqxstex.c, 1.83.1.9 |
| Line Number :- 1865 |
| Build Date :- Jan 23 2008 |
| CMVC level :- p600-203-080123 |
| Build Type :- IKAP - (Production) |
| UserID :- 00006001 (siebel) |
| Program Name :- siebmtshmw |
| Addressing mode :- 32-bit |
| Process :- 549254 |
| Thread :- 105 |
| QueueManager :- SEFFNG01 |
| ConnId(4) App :- 0 |
| Last HQC :- 1.0.0-30232 |
| Last HSHMEMB :- 1.1.0-2176928 |
| Major Errorcode :- xecX_E_SEGMENT_TABLE_FULL |
| Minor Errorcode :- OK |
| Probe Type :- MSGAMQ6207 |
| Probe Severity :- 2 |
| Probe Description :- AMQ6207: Failed to attach shared memory segment as |
| Segment table is Full. |
| FDCSequenceNumber :- 0 |
| Arith1 :- 1049177 100259 |
| Arith2 :- 24 18 |
| Comment1 :- Failed to attach shared memory segment: shmat(ShmId |
| 0x00100259) [rc=-1 errno=24] Too many open files |
| Comment2 :- Too many open files |
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dutchman
PostPosted: Mon Jan 18, 2010 3:50 am    Post subject: Reply with quote

Acolyte

Joined: 15 May 2001
Posts: 71
Location: Netherlands

Hi - on a previous post a reference was made to this website: http://www-01.ibm.com/support/docview.wss?uid=swg1IY99425 .

This shows that more is required above and beyond MQ V6.0.2.3 :

The following changes are required to accompany the application
of this APAR in order for MQ V6 to be able to exploit EXTSHM:
1. To ensure that hyper APAR IY66127 (for AIX5.2) or IY66147
(for AIX5.3) is present on the system;
2. To start the WMQ v6 queue managers with EXTSHM set.

Regards ... Ruud
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manojsu
PostPosted: Mon Jan 18, 2010 4:32 am    Post subject: Reply with quote

Centurion

Joined: 19 Jul 2006
Posts: 147
Location: Bangalore

The prereq have been taken care off...

instfix -ivk IY66147
IY66147 Abstract: 32-bit AIO applications fail with EXTSHM=ON

Fileset bos.mp:5.3.0.11 is applied on the system.
Fileset bos.mp64:5.3.0.11 is applied on the system.
All filesets for IY66147 were found.

And before starting the Queue Managers i did set the EXTSHM parameter.
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dutchman
PostPosted: Mon Jan 18, 2010 5:08 am    Post subject: Reply with quote

Acolyte

Joined: 15 May 2001
Posts: 71
Location: Netherlands

okidoki, just humor for a moment as we continue checking things... can u pls go to /var/mqm/errors where your FDC files are stored and issue the following unix command:
fgrep EXTSHM *

and paste results here. Hopefully the list of files being reported will include the FDC you mentioned earlier on.

Cheers ... Ruud
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manojsu
PostPosted: Mon Jan 18, 2010 5:15 am    Post subject: Reply with quote

Centurion

Joined: 19 Jul 2006
Posts: 147
Location: Bangalore

Did execute the command, there has been no output at all.
i have set the EXTSHM variable in the .profile file.
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dutchman
PostPosted: Mon Jan 18, 2010 5:27 am    Post subject: Reply with quote

Acolyte

Joined: 15 May 2001
Posts: 71
Location: Netherlands

Hmm ... interesting. I does suggest that you are not setting it. From my end I see:
/var/mqm/errors>fgrep EXTSHM *
AMQ1089764.0.FDC:EXTSHM=ON
AMQ1204268.0.FDC:EXTSHM=ON
AMQ1667090.0.FDC:EXTSHM=ON
AMQ835708.0.FDC:EXTSHM=ON
AMQ851968.0.FDC:EXTSHM=ON
AMQ974858.0.FDC:EXTSHM=ON

The good thing about the FDCs is that they tend to dump the value of the various environment variables at the time of the error. How are you setting this variable? ... from within the profile of the mqm account?

Regards ... Ruud
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manojsu
PostPosted: Mon Jan 18, 2010 5:40 am    Post subject: Reply with quote

Centurion

Joined: 19 Jul 2006
Posts: 147
Location: Bangalore

Yup, I am setting the variable in the profile.

export EXTSHM=ON

and after that in a new shell started the queue managers.
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dutchman
PostPosted: Mon Jan 18, 2010 5:43 am    Post subject: Reply with quote

Acolyte

Joined: 15 May 2001
Posts: 71
Location: Netherlands

yeah ... I've just noticed that the env var display is for an MQ V7.0.1 system; on my other systems which are MQ V5.3.x I can't see them in the FDCs eventough it is explicitly set - so looks like MQ V7.x is 'better' in terms of capturing certain types of data.

I'm out of ideas at the moment, so the next question is: when r u going to upgrade

Ruud
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manojsu
PostPosted: Mon Jan 18, 2010 5:53 am    Post subject: Reply with quote

Centurion

Joined: 19 Jul 2006
Posts: 147
Location: Bangalore

i have upgraded from 6.0.2.1 to 6.0.2.3 yesterday. which has not solved the purpose of my upgrade..
are you speaking on the migration to v7.. not in the new future as of now
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dutchman
PostPosted: Mon Jan 18, 2010 6:05 am    Post subject: Reply with quote

Acolyte

Joined: 15 May 2001
Posts: 71
Location: Netherlands

Dies this apply: http://www.mqseries.net/phpBB2/viewtopic.php?t=41575 ?
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mvic
PostPosted: Mon Jan 18, 2010 8:41 am    Post subject: Reply with quote

Jedi

Joined: 09 Mar 2004
Posts: 2080

manojsu wrote:
i have upgraded from 6.0.2.1 to 6.0.2.3 yesterday. which has not solved the purpose of my upgrade..
are you speaking on the migration to v7.. not in the new future as of now

v6 FDCs do tend to contain a dump of the environment.

Do you have environment dumps at the end of your FDC records? They will probably contain mentions of SHELL= and PWD= and HOME= for example.

If you do have environment dumps yet EXTSHM is missing from them, then somehow and for some reason the setting was not effective.
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PeterPotkay
PostPosted: Mon Jan 18, 2010 9:01 am    Post subject: Reply with quote

Poobah

Joined: 15 May 2001
Posts: 7722

manojsu wrote:
i have upgraded from 6.0.2.1 to 6.0.2.3 yesterday.

What do you have against 6.0.2.4, 6.0.2.5, 6.0.2.6, 6.0.2.7 and 6.0.2.8?They include hundreds of fixes to problems that are in 6.0.2.1 or 6.0.2.3. Apply 6.0.2.8 if you are applying a Fix Pack. Its been out for weeks and does not have any major problems.

You added that variable to the mqm profile. Are you sure the profile is being executed? How are you switching to the mqm ID when you want to start the QM?
_________________
Peter Potkay
Keep Calm and MQ On
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issac
PostPosted: Wed Apr 14, 2010 9:46 pm    Post subject: Reply with quote

Disciple

Joined: 02 Oct 2008
Posts: 158
Location: Shanghai

so have you solved the problem? am i late?

I suppose you are not bothering with SH segments, rather the number of open files.

I suggest you change ULIMIT of your mqm account. Setting entry "nofiles" somewhere remarkably high, or unlimited.

Please come back to tell if it works.


| Comment1 :- Failed to attach shared memory segment: shmat(ShmId |
| 0x00100259) [rc=-1 errno=24] Too many open files |
| Comment2 :- Too many open files |
_________________
Bazinga!
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manojsu
PostPosted: Tue Aug 17, 2010 5:54 am    Post subject: Reply with quote

Centurion

Joined: 19 Jul 2006
Posts: 147
Location: Bangalore

Apologies for the delay in getting back, although we are still generating FDC's with the same reason.
we have set ulimited for all the procceses, threads, stack, file etc.

we are on fixpack 6.0.2.3 which should have fixed all the issues.. but hasnt.
any inputs of whether i am missing anything.
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