Vacuum full on a big table

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Hi all,
is there a way to vacuum full a table but working only
a part of the table ? I have a table with 6 milion rows
and vacuum full it will send out of line for hours my
server, so I'll like to vacuum that table multiple times
in order to not block that table for a long period.

It will work decresing the FSM settings ?


Regards
Gaetano Mendola



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