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vasanthz
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Joined: 28 Aug 2007
Posts: 1742
Location: Tirupur, India
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Hi,
We are facing deadlocks in a DB2 table and the table is created with LOCKSIZE=ANY.
Manual says that ANY lets DB2 choose the locking size.
Is it possible to determine what LOCKSIZE was chosen by DB2 during a period of deadlock. We have BMC DB2 tools and SMF.
Regards,
Vasanth.S |
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Rohit Umarjikar
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Joined: 21 Sep 2010
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Location: NYC,USA
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Usually it will be LOCKSIZE PAGE
Change to LOCKSIZE ROW and watch , if you see frequent contention. |
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vasanthz
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Joined: 28 Aug 2007
Posts: 1742
Location: Tirupur, India
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Thank you.
Would it be ok to change it to ROW without identifying what level locking was used prior to the deadlock. I thought we could go one lower level of lock than the lock that caused deadlocks |
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Rohit Umarjikar
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Location: NYC,USA
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LOCKSIZE ROW is the lower level than LOCKSIZE PAGE. I don't think LOCKSIZE ANY would use LOCKSIZE ROW by itself in a situations like when LOCKSIZE PAGE is not sufficient.
I would look at LOCK ESCALATIONS too to know what it is defined.
This is my understanding but double check with DBA and if its different than above then I would learn something. |
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PeterHolland
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Location: Netherlands, Amstelveen
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vasanthz
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Joined: 28 Aug 2007
Posts: 1742
Location: Tirupur, India
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| Thanks Rohit and Peter. I will review the information provided |
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