On Thursday 2025-10-30 18:00, Ron Johnson wrote:
> SELECT reltuples FROM pg_class WHERE relname =
'test_runs_summarized_per_function' \gx
-[ RECORD 1 ]-----------
reltuples | 6.061923e+09
> SELECT name,setting FROM pg_settings WHERE name ILIKE '%factor%' ;
name | setting
---------------------------------------+---------
autovacuum_analyze_scale_factor | 0.1
0.1 means 10%.
autovacuum_vacuum_insert_scale_factor | 0.2
autovacuum_vacuum_scale_factor | 0.2
recursive_worktable_factor | 10
n_mod_since_analyze=423101205
n_live_tup=6484485348
n_mod_since_analyze/n_live_tup = 6.5%
How can I get more info from postgres on the autovacuum logic?
I would:
1) manually VACUUM ANALYZE the table,
2) drop the three autovacuum_*_scale_factor values down to 0.03 (i.e. 3%),
Reporting back, after reducing the values, the table has been picked up
for both autovacuum and analyze. Thank you for the immediate feedback!
Since I had spent some time looking into these values and was "certain"
that they were % while they are apparently *not*, I'm wondering if
max_val=100 is there because of historical reasons, and if it would make
sense to change it to 1.
Dimitris
