The attached patch applies to CVS tip as of 02/05/2004 and implements the cost based vacuum delay feature.

A detailed description with charts of different configuration settings can be found here:

There is a problem left that seems to be related to Toms observations in the shutdown behaviour of the postmaster. My current guess is that the napping done via select(2) somehow prevents responding to the query abort signal.


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Attachment: vacuum_cost.75devel.diff.gz
Description: GNU Zip compressed data

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