Re: Autovacuums not triggering anymore

Thomas SIMON wrote:
> Hi all,
>
> Since two days, autovacuum_analyze & autovacuum_vacuum does not trigger
> anymore on any of my databases (but they are started on db template1).
> Before, I had around at least 30 analyzes and 400 vacuums per hour on these
> DBs.

Are autovacuum workers all busy processing some very large? Look for
them in pg_stat_activity. If not, identify what is the autovacuum
launcher process doing; perhaps attach a debugger to it and see if it
ever calls launch_worker() or do_start_worker(). If time longer than
autovacuum_naptime lapses and it doesn't, have a look at the "stats
collector process"; is that one alive and working? If you attach to it
with a debugger, you should see it operate if you do a simple query in a
session such as "select * from pg_stat_user_tables". In that query,
also verify the autovacuum and autoanalyze timestamps.

--
Álvaro Herrera http://www.2ndQuadrant.com/
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