Re: pg_autovacuum (pg_avd version 2)

Added to /contrib.  Thanks.

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Matthew T. O'Connor wrote:
> I have updated my pg_autovacuum program (formerly pg_avd, the name
> changed as per discussion on the patches list).
>
> This version should be a good bit better.  It addresses all the issues
> pointed out by Neil Conway. Vacuum and Analyze are now handled
> separately.  It now monitors for xid wraparound.  The number of database
> connections and queries has been significantly reduced compared the
> previous version.  I have moved it from bin to contrib.  More detail on
> the changes are in the TODO file.
>
> I have not tested the xid wraparound code as I have to let my AthlonXP
> 1600 run select 1 in a tight loop for approx. two days in order to
> perform the required 500,000,000 xacts.
>
> Side note: in trying to test the xid wrap around code I noted that the
> select 1 query is nearly 30% slower with stats_row_level = true.  I
> guess this is another reason for a backend integrated autovacuum that
> not built on top of the stats system.  I know the net effect is reduced
> with more realistic queries but still seems like a lot.
>
> As always, any and all feedback is appreciated.
>
> Matthew T. O'Connor
>
>

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