> Bruce Momjian <pgman@candle.pha.pa.us> writes:
> >> 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.
>
> That's why I'm asking what the data is. The function calls per se can't
> be that slow; I think there must be some datatype-specific issue.
>
> With TOAST in the mix, TOAST fetches could very well be an issue, but
> I didn't think 7.1 was being discussed ...
>
I would love to hear what the issue is with ANALYZE. There isn't much
going on with ANALYZE except the function calls.
--
Bruce Momjian | http://candle.pha.pa.us
pgman@candle.pha.pa.us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
