Re: Vacuum only with 20% old tuples

> I can see some value in having a _configurable_ threshold %age of
> deletes before vacuum kicked in and attempted to shrink table/index
> on-disk file sizes.  This would let the end-user decide, and 20% is
> probably a reasonable default, but if it isn't then changing a default
> is easier to do down the track.
> 
> I can also see that it could be done with (perhaps) a modification to
> VACUUM syntax, say:
>     VACUUM [VERBOSE] [SHRINK] ...
> 
> And I believe that the whole thing will go better if ANALYZE is taken
> _out_ of vacuum, as was discussed on this list a month or two ago.

The analayze process no longer locks the table exclusively.  It will be
made a separate command in 7.1, though an ANALYZE option will still be
avaiable in VACUUM.

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
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