Re: vacuum analyze again...

> To get a partial VACUUM ANALYZE that was actually usefully faster than
> the current code, I think you'd have to read just a few percent of the
> blocks, which means much less than a few percent of the rows ... unless
> maybe you picked selected blocks but then used all the rows in those
> blocks ... but is that a random sample?  It's debatable.
>
> I find it hard to believe that VAC ANALYZE is all that much slower than
> plain VACUUM anyway; fixing the indexes is the slowest part of VACUUM in
> my experience.  It would be useful to know exactly what the columns are
> in a table where VAC ANALYZE is considered unusably slow.

VACUUM ANALYZE does a huge number of adt/ function calls.  It must be
those calls that make ANALYZE slower.  People report ANALYZE is
certainly slower, and that is the only difference.

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