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"Snapshot is too old" problem [message #360365]

Thu, 20 November 2008 12:27

registereduser
Messages: 52
Registered: June 2008
Location: Toronto

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It is caused by running procedures. The dataset is very large. I am petty sure procedures do not have problem. How to fix it?

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Re: "Snapshot is too old" problem [message #360367 is a reply to message #360365]

Thu, 20 November 2008 12:42

joy_division
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Registered: February 2005
Location: East Coast USA

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From the code you posted I say that indeed there is a problem with the procedures.

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Re: "Snapshot is too old" problem [message #360368 is a reply to message #360365]

Thu, 20 November 2008 12:45

Michel Cadot
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Do not commit inside the loop.

Regards
Michel

[Updated on: Thu, 20 November 2008 12:45]

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Re: "Snapshot is too old" problem [message #360369 is a reply to message #360368]

Thu, 20 November 2008 12:59

registereduser
Messages: 52
Registered: June 2008
Location: Toronto

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Thanks a lot.

I have checked again. It could not be script problem because it has run many many times in many many machines.

The problem is related to the undo segment while reach "rollback".

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Re: "Snapshot is too old" problem [message #360370 is a reply to message #360369]

Thu, 20 November 2008 13:06

Michel Cadot
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Quote:

The problem is related to the undo segment while reach "rollback".

No, this is not possible.

Regards
Michel

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Re: "Snapshot is too old" problem [message #360371 is a reply to message #360370]

Thu, 20 November 2008 13:17

registereduser
Messages: 52
Registered: June 2008
Location: Toronto

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a guy in my company told me it could be caused by too many rowes processed by the procedures. It cause the undo segment too large to stay in the memory and eventually caused the snapshot too old problem.

he suggests me to cut the process into segments and commited more often.

I am trying this way now.

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Re: "Snapshot is too old" problem [message #360373 is a reply to message #360371]

Thu, 20 November 2008 13:39

Michel Cadot
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Reread my first post.

Regards
Michel

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Re: "Snapshot is too old" problem [message #360385 is a reply to message #360371]

Thu, 20 November 2008 15:11

Littlefoot
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Registered: June 2005
Location: Croatia, Europe

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registereduser

he suggests me to cut the process into segments and commited more often. I am trying this way now.

Sounds like a great way to be sure to run into the ORA-01555: snapshot too old error.

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