Csaba Nagy wrote:
> Now when the queue tables get 1000 times dead space compared to their
> normal size, I get performance problems. So tweaking vacuum cost delay
> doesn't buy me anything, as not vacuum per se is the performance
> problem, it's long run time for big tables is.
So for you it would certainly help a lot to be able to vacuum the first
X pages of the big table, stop, release locks, create new transaction,
continue with the next X pages, lather, rinse, repeat.
This is perfectly doable, it only needs enough motivation from a
knowledgeable person.
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Alvaro Herrera http://www.CommandPrompt.com/
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