Tom Lane wrote:
> Bruce Momjian <[EMAIL PROTECTED]> writes:
> > Do all the columns have to have the same number of statistics buckets? 
> 
> They do not, but the effort spent by ANALYZE is proportional to the
> largest stats target among all the columns of the table.

Could we use previous stats to determine how many buckets to use when
running ANALYZE.  Also, if columns have a different number of buckets,
does that mean that we don't have the same per-query overhead for a
larger stats target?

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TIP 8: explain analyze is your friend

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