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Fast path buffer warning

 
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abin

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Joined: 14 Aug 2006
Posts: 198

PostPosted: Thu May 29, 2008 3:08 pm    Post subject: Fast path buffer warning
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Hi,

One of my IMS DB code gave me n FW return in production. I'm trying to check whether the DB is upadetd, but dodnt have direct production Db acccess.

The return code I got was FW, for which I found following explanation.

If you have been processing a DEDB, you get FW for requests that change data.

The DB I'm trying to update is a DEDB.

Could some body tell me whether data will be updated in cases where a FW is returned.
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am_ne

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Joined: 24 Mar 2007
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Location: Bangalore

PostPosted: Thu May 29, 2008 3:14 pm    Post subject:
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This is only a warning condition and it means the program consumed all NBA allocated buffers and started using OBA buffers.

The job will continue processing..

Thanks
Amit
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abin

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PostPosted: Thu May 29, 2008 3:56 pm    Post subject:
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Thanks Amit,

So even if a FW is returned the segment it was processing will be updated right???
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am_ne

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PostPosted: Thu May 29, 2008 4:26 pm    Post subject:
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It will continue processing till it receive "FR" status code. If your program ended before that then it was able to update the segment successfully.

Thanks
Amit
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abin

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PostPosted: Thu May 29, 2008 5:04 pm    Post subject:
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Thanks Amit for the info. In my case the code was issuing a checkpoint while recieving the FW status code.
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abin

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PostPosted: Thu May 29, 2008 8:05 pm    Post subject:
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Hi,

I would like to get some more info on this subject. This job is running in production for 6th time. For all the previous runs job used files bigger than the current one. none of them made any issue with buffer.

Is the buffer allocated for each run different. The NBA, OBA componenet that I gave was as follows.
NBA=30, OBA=10
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am_ne

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Location: Bangalore

PostPosted: Mon Jun 02, 2008 10:57 am    Post subject:
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No. IMS will allocate the NBA buffers when it starts the progrm.
As you know buffers are used to store and manipulate the CIs those are retrieved from the secondary devices,where database resides. according to application calls.Here this is not a problem with allocation. The problem is how many buffers you are using before check pointing.
Check point releases the resources.

So The input size doesn't have any impact on the buffer allocation.

Thanks
Amit
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abin

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PostPosted: Mon Jun 02, 2008 5:50 pm    Post subject:
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Thanks Amit for the updates, any I'm now issuing a checkpoint each time reciveing an FW, That solves the problem.
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