We've just recently started seeing sporadic constraint violations on system 
tables.  For example:

  duplicate key violates unique constraint "pg_class_oid_index" [for Statement 
"CREATE TEMPORARY TABLE...

and

  duplicate key violates unique constraint "pg_toast_4292803267_index" [for 
Statement "INSERT INTO...

and the occasional

  unexpected chunk number 0 (expected 1) for toast value

I suspect that the problem is due to oid reuse, but I'd like to get a second 
opinion.  We've just recently grown to a billion tuples in our database (with 
all our tables built with oids), and the volume of activity makes me think it's 
likely that the majority of records have been updated three or four times.

Our current plan for dealing with the problem is to 'SET WITHOUT OIDS' on our 
tables, then dump & restore the database.

Does it seem reasonable that oid reuse could cause the constraint violations?  
Does it seem likely that this would fix the problem?  Is there an easier way to 
solve the problem?

Thanks in advance

-- 
Aaron Harsh
[EMAIL PROTECTED]
503-284-7581 x347


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