Re: DB Tuning Notes for comment...

At 08:39 PM 9/12/2002 -0500, Tom Lane wrote:
>A VACUUM
>done just after startup does not have any historical info to base this
>decision on.

The actual order is:

start
delete
vacuum;
insert <- does not use free space
vacuum;
insert <- does not use free space
vacuum;
vacuum;
insert <- uses free space

my guess is the fact that the second vacuum has no useful statistics means 
that (somehow) it is choosing the tables with free space -- perhaps because 
they are the largest?




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