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| banjar1 |
 Posted: Tue Apr 17, 2007 2:34 am Post subject: Restarting amqzllp0? |
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Acolyte
Joined: 29 Nov 2006
Posts: 54
Location: FRA
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Hi.
I noticed that amqzllp0 (Checkpoint processor) is not running on some of our Queue Managers. How critical is it?
How can I start it manually?
Rgds,
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Jarek Banachowicz |
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| banjar1 |
| Posted: Wed Apr 18, 2007 10:28 pm Post subject: |
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Acolyte
Joined: 29 Nov 2006
Posts: 54
Location: FRA
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| dgolding |
| Posted: Thu Apr 19, 2007 12:21 am Post subject: |
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Yatiri
Joined: 16 May 2001
Posts: 668
Location: Switzerland
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You need to restart the queue manager to restart this process - there is no supported way to start start an individual MQ process (except thngs like the listener, trigger monitor, command server and the like - internal processes need an endmqm followed by a strmqm)
You say "some" of your queue managers don't have this process running - do you have any FDC files or log entries that might explain why? |
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| banjar1 |
| Posted: Thu Apr 19, 2007 6:21 am Post subject: |
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Acolyte
Joined: 29 Nov 2006
Posts: 54
Location: FRA
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Thanks a lot!
Unofrtunately I have no errort report. Apparently it happened some time ago and went unnoticed. Only after it was observed for one of QM I have checked the others and found the process missing on some of them.
Unfortunately restart of any of our QMs must be announced well ahead. An outage would have to be requested and most likely customer(s) would respond with a time window in ungodly hours... That's why I would like to know how critical it is to have amqzllp0 running? |
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| dgolding |
| Posted: Thu Apr 19, 2007 6:46 am Post subject: |
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Yatiri
Joined: 16 May 2001
Posts: 668
Location: Switzerland
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Obviously can't be that important if everything is still running!
However, I found this:
http://www.mqseries.net/phpBB2/viewtopic.php?t=9326
The last post seems to suggest that hasmx/harmx/zllp0 have all disappeared at 6.0. The V6.0 Sys admin manual seems to confirm this - sorry I haven't got a v6 queue manager to hand. The Appendix E stopping a queue manager manually does not refer to these processes any more.
So, my question is - what version of MQ are you running where this process is missing? |
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| fjb_saper |
| Posted: Thu Apr 19, 2007 12:52 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| banjar1 wrote: |
Thanks a lot!
Unofrtunately I have no errort report. Apparently it happened some time ago and went unnoticed. Only after it was observed for one of QM I have checked the others and found the process missing on some of them.
Unfortunately restart of any of our QMs must be announced well ahead. An outage would have to be requested and most likely customer(s) would respond with a time window in ungodly hours... That's why I would like to know how critical it is to have amqzllp0 running? |
The most critical for the checkpointing process is if you are running with linear logs. If you cannot checkpoint you cannot move to the next logs (for media recovery) and you fill up the logspace killing the qmgr in the process...
Enjoy 
_________________
MQ & Broker admin |
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| banjar1 |
| Posted: Fri Apr 20, 2007 3:57 am Post subject: |
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Acolyte
Joined: 29 Nov 2006
Posts: 54
Location: FRA
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| Ok, that sounds reassuring for me as we only have circular logs. Does it mean I can safely (relatively) live without the checkpoints? |
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| dgolding |
| Posted: Fri Apr 20, 2007 4:01 am Post subject: |
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Yatiri
Joined: 16 May 2001
Posts: 668
Location: Switzerland
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Even with circular logging you still have the zllp0 process running at MQ 5.3. The only difference with processes in this version was harmx or hasmx, depending on whether you had circular or linear logging.
To repeat my original question, what version of MQ do you have? This process DOES NOT EXIST at 6.0 it seems....
Last edited by dgolding on Fri Apr 20, 2007 5:17 am; edited 1 time in total |
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| dgolding |
| Posted: Fri Apr 20, 2007 4:07 am Post subject: |
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Yatiri
Joined: 16 May 2001
Posts: 668
Location: Switzerland
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And, more to the point, I just created a queue manager on AIX (MQ5.3) started it and killed the zllp0 process - which crashed the queue manager (don't worry I didn't do this on a production system  ). So, yes, it's really important, circular or linear for 5.3.
Last edited by dgolding on Fri Apr 20, 2007 5:18 am; edited 1 time in total |
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| banjar1 |
| Posted: Fri Apr 20, 2007 4:51 am Post subject: |
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Acolyte
Joined: 29 Nov 2006
Posts: 54
Location: FRA
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Here are my findings:
we run MQ6 and MQ5. This process is MQ5 specific, in MQ6 it is apparently replaced by amqzmuc0... and this one is running just fine on our MQ6 Queue Managers
So, thank you all for help! I have learnt something new again |
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| kevinf2349 |
| Posted: Fri Apr 20, 2007 5:10 am Post subject: |
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Grand Master
Joined: 28 Feb 2003
Posts: 1311
Location: USA
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| banjar1 wrote: |
Here are my findings:
we run MQ6 and MQ5. This process is MQ5 specific, in MQ6 it is apparently replaced by amqzmuc0... and this one is running just fine on our MQ6 Queue Managers
So, thank you all for help! I have learnt something new again |
Which just goes to show the benfits of actually informing the people on here things like platforms and versions when asking questions.  |
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