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MQSeries.net Forum Index » WebSphere Technologies FAQ » Removing shared memory resources on Unix

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royr
PostPosted: Sun Aug 19, 2001 2:02 am    Post subject: Reply with quote

Acolyte

Joined: 30 Jun 2001
Posts: 65
Location: Israel

This is required after the queue manager has ended abnormally and before it's restarted.

This command removes all shared memory resources and semaphores that belong to user mqm:

Code:

ipcs -a | grep mqm | awk '{printf( "-%s %s ", $1, $2 )}' | xargs ipcrm



[ This Message was edited by: royr on 2001-08-27 01:35 ]
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john_bazeley
PostPosted: Sun Aug 26, 2001 7:33 pm    Post subject: Reply with quote

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Joined: 25 Aug 2001
Posts: 6
Location: New Zealand

If you do this when you've got more than 1 QM, or things like client trigger monitors running on the same box, you'll be in big trouble.
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kriersd
PostPosted: Thu Nov 07, 2002 11:56 am    Post subject: Reply with quote

Master

Joined: 22 Jul 2002
Posts: 209
Location: IA, USA

Code:

If you do this when you've got more than 1 QM, or things like client trigger monitors running on the same box, you'll be in big trouble


So, Is there a way to identify which mqm shared memory resources and semaphores belong to a given queue manager. I would like to find out how to clean up the remaining shared resources for just one of the queue managers running on the server.
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bower5932
PostPosted: Mon Nov 11, 2002 11:52 am    Post subject: Reply with quote

Jedi Knight

Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA

Try looking at the amqiclen utility. However, I don't believe it is documented and I think it has a disclaimer about only running it if directed by IBM support. You can run it with amqiclen -help to get a brief usage message. The program will hang unless you pipe in the mqs.ini file:

amqiclen -v -c -m QmgrName < /var/mqm/mqs.ini
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kriersd
PostPosted: Thu Dec 05, 2002 8:59 am    Post subject: Reply with quote

Master

Joined: 22 Jul 2002
Posts: 209
Location: IA, USA

NOTE -c only does a check... It does NOT remove any resources.

amqiclen -v -c -m qmgrname < /var/mqm/mqs.ini
.
-v = verbose
-c = check only (does not ipcrm anything)
-m = only to clear up named queue manager
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csmith28
PostPosted: Wed Dec 22, 2004 3:07 pm    Post subject: Reply with quote

Grand Master

Joined: 15 Jul 2003
Posts: 1197
Location: Arizona

amqiclen -m MQMgrName -vix
Usage: ./amqiclen {-c | -x} -c = check -x = destroy
[-m <qmgr> | -s] -m = queue manager. -s = system subpool
[-p <prefix>] qmgrs directory Prefix (/var/mqm)
[-q] queue manager subpool
[-i] IPCC subpool
[-o] persistent queue manager subpool
[-t] trace control
[-F] Force (deleted active segments)
[-v] verbose
[-h] headings
[-d] display remaining resources

The options in detail are:

-c: check IPC only, do not remove
-x: remove IPC. Only IPC owned by mqm is removed.
Note that these options are mutually exclusive; one or the other must be
selected.

-m QMGR: check/remove IPC on qmgr QMGR
-s: check/remove IPC in the system subpool, i.e. the qmgr @SYSTEM
-p prefix: search for qmgr data in directory prefix (default /var/mqm)
-q: IPC in qmgr subpool only, i.e. shm/sem dirs in the qmgrs/QMGR dir
-i: IPC in IPCC subpool only, i.e. shm/sem dirs in the qmgrs/QMGR/@ipcc dir
-o: IPC in qmpersist subpool only, i.e. shm/sem dirs in the
qmgrs/QMGR/@qmpersist dir directory. The directories are shmem esem isem
msem ssem
-t: Trace control shm/sem, keyed from /var/mqm/errors
-F: Force removal. Normal operation is not to remove IPC which is in
use. This is determined by checking the processes using a semaphore, or
the number of processes attached to a shared memory segment. This flag
bypasses these checks
-v: Where appropriate, print output showing the progress of the utility
-h: Print headings in the output
-d: Run the commands ipcs -m and ipcs -s

Further notes
In the above I refer to "IPC .. keyed from files..". This means that the
key of a semaphore set or shared memory segment is derived from the
inode of a file or directory in the MQ directory tree.
Note that the -m | -s flags are not mandatory. If both flags are
omitted, amqiclen checks (removes) IPC from all directories found in the
prefix/qmgrs

The arguments conform to the usual UNIX rules for parsing the command
line. The options may be specified separately, e.g. amqiclen -c -v -h -t
-m QMGR, or they may be concatenated until an option is reached that
requires a further argument, e.g. amqiclen -cvhtmQMGR has the same effect.
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Nigelg
PostPosted: Wed Dec 22, 2004 11:17 pm    Post subject: Reply with quote

Grand Master

Joined: 02 Aug 2004
Posts: 1046

The input redirect from /var/mqm/mqs.ini is old syntax, and is no longer required.
amqiclen is fully supported by IBM, and you can raise defects/APARs against the utility.
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positional
PostPosted: Wed Dec 14, 2005 10:32 am    Post subject: amqiclen utility Reply with quote

Newbie

Joined: 14 Dec 2005
Posts: 4

Hello,

Is there any way to run amqiclen utility or any other non- IBM utility that cleans shared memory segments/semaphores without stopping a queue manager?

Thanks in advance.

Mark
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jefflowrey
PostPosted: Wed Dec 14, 2005 11:09 am    Post subject: Reply with quote

Grand Poobah

Joined: 16 Oct 2002
Posts: 19981

You wouldn't want to remove MQ shared memory for a running queue manager.

You'd probably crash the QM.
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positional
PostPosted: Wed Dec 14, 2005 11:22 am    Post subject: Reply with quote

Newbie

Joined: 14 Dec 2005
Posts: 4

Good point. Thanks, Jeff
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Tdak
PostPosted: Tue Jul 01, 2008 2:54 am    Post subject: Reply with quote

Novice

Joined: 30 Jun 2008
Posts: 18
Location: South Africa

Which command can I use on Windows????

positional wrote:
Good point. Thanks, Jeff
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sebastianhirt
PostPosted: Wed Jul 02, 2008 2:00 am    Post subject: Reply with quote

Yatiri

Joined: 07 Jun 2004
Posts: 620
Location: Germany

If I am not completely wrong, you don't need one on Windows, because there are no semaphores
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rachakonda_v
PostPosted: Mon Mar 31, 2014 7:54 am    Post subject: HOW TO RECOVER SYSTEM.ADMIN.ACCOUNTING QUEUE IN UNIX Reply with quote

Newbie

Joined: 14 Jun 2012
Posts: 7

I want to recover SYSTEM.ADMIN.ACCOUNTING.QUEUE in MQ by using UNIX server.

I gave command "rcrmqobj -m QUEUE MANAGER NAME -t SYSTEM.ADMIN.ACCOUNTING QUEUE"

But it's throwing an error - AMQ7027 " -Arguments supplied for RCRMQOBJ are not valid
- AMQ7024 " Arguments supplied -t is not valid

Can any one help me on this issue, its' urgent.

Thanks.
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exerk
PostPosted: Mon Mar 31, 2014 8:02 am    Post subject: Re: HOW TO RECOVER SYSTEM.ADMIN.ACCOUNTING QUEUE IN UNIX Reply with quote

Jedi Council

Joined: 02 Nov 2006
Posts: 5074

rachakonda_v wrote:
I want to recover SYSTEM.ADMIN.ACCOUNTING.QUEUE in MQ by using UNIX server.

I gave command "rcrmqobj -m QUEUE MANAGER NAME -t SYSTEM.ADMIN.ACCOUNTING QUEUE"

But it's throwing an error - AMQ7027 " -Arguments supplied for RCRMQOBJ are not valid
- AMQ7024 " Arguments supplied -t is not valid

Can any one help me on this issue, its' urgent.

Thanks.

-t is type, and SYSTEM.ADMIN.ACCOUNTING.QUEUE is not a type, it's the name of an object type...

...read the examples given in the Info Centre for that command.
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bruce2359
PostPosted: Mon Mar 31, 2014 8:04 am    Post subject: Reply with quote

Jedi Council

Joined: 05 Jan 2008
Posts: 6710
Location: US: west coast, almost.

First, please don't use a years-old post; rather, create a new one.

Second, go to google, and research the syntax and parameters for the rcrmqobj supplied control program. You are incorrectly specifying the -t switch.
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