On 08/28/2017 09:12 AM, Don Seiler wrote:
> Same concerns as Phil's reply. Are the numbers in pg_stat_all_tables not
> part of what autovacuum looks at? I assume those numbers would be
> updated by autoanalyze but if that only kicks in at 10% scale factor
> then that wouldn't happen for a while either? Seems like there's a huge
> disconnect here, or I just don't have my head around this properly. Or both.
Well some values are maintained by analyze, but with a 0.1 scale factor
for analyze that still means 7 million rows or so threshold for that to
happen. E.g. see:
src/backend/commands/analyze.c
-------
/*
* Report ANALYZE to the stats collector, too. However, if doing
* inherited stats we shouldn't report, because the stats collector only
* tracks per-table stats. Reset the changes_since_analyze counter only
* if we analyzed all columns; otherwise, there is still work for
* auto-analyze to do.
*/
-------
Joe
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