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| BBM |
 Posted: Fri Dec 16, 2005 5:08 am Post subject: Log files full with linear logging |
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Master
Joined: 10 Nov 2005
Posts: 217
Location: London, UK
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Hi everyone,
We have a problem where our TEST Qm has run out of log file space.
Our developers were running a program to load MQ with a high volume of messages last night. Since then MQ has been issuing log file full messages every second in the error logs.
Now the part I don't understand is that we're using linear logging with lots of disk space available and 40 primary and 30 secondary logs.
I have confirmed with the developers that these messages are not transactional so there are no long running transactions keeping the active log space held open.
I know I can re-spec the logs or even recreate the QM to increase log file size but I don't see why that should be necessary.
Surely when MQ runs out of linear log files it should create more where there are no transactions.
The problem I have is that they want to do the same testing tomorrow night in production and I don't really want to be dealing with a poorly QM as our TEST qm is now (understandably) issuing FDCs all over the place..
Any advice gratefully received as ever! 
BBM |
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| BBM |
| Posted: Fri Dec 16, 2005 6:48 am Post subject: |
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Master
Joined: 10 Nov 2005
Posts: 217
Location: London, UK
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OK just realised that the log voume is out of disk space doh!
No I understand why it ran out oif log space....
Unfortunately there is no space I can free up - so it will have to be a rebuild. |
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| fjb_saper |
| Posted: Fri Dec 16, 2005 11:58 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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A little bit late considering the time:
A rebuild is not always necessary....
You can check in the error log what are the logs needed (earliest between restart and image recovery) and archive / delete any log prior to that.
This should free up space.
40 primaries and 30 secondaries won't cut it. Max is 62 total.
I usually set my max to 50. So I get alerted early. Can possibly cut an image (rcdmqimg) and archive off old logs.... but had to go to 30 Gig (25 hours) of linear log space because of a non fully XA compliant transaction manager....
Enjoy  |
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| wschutz |
| Posted: Fri Dec 16, 2005 12:12 pm Post subject: |
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Jedi Knight
Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
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and there are two supportpacs to help with LL maintenance .....
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-wayne |
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| PeterPotkay |
| Posted: Fri Dec 16, 2005 2:58 pm Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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| fjb_saper wrote: |
| 40 primaries and 30 secondaries won't cut it. Max is 62 total. |
He didn't state his MQ version, but if it as at 6.0, the total number of primary and secondary log files must not exceed 255 on Windows, or 511 on UNIX systems, and must not be less than 3.
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Peter Potkay
Keep Calm and MQ On |
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| fjb_saper |
| Posted: Fri Dec 16, 2005 6:18 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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Thanks for the clarification Peter. I guess I need to read up a little myself on 6.0....  |
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