>>> Looking at audit logs, I see that my Postgresql server generates a new thread >>> precisely every 30 seconds, in two series (so 4 threads every minute). This >>> is an otherwise idle server. > >>> Does anyone know what these threads are for? Just curious. > >Autovacuum, likely. The rate would depend on your autovacuum_naptime >and how many active databases you have. Yep, that was it, thanks. I had the default autovacuum_naptime of 1 minute, and had two Postgresql clusters runing. I turned off autovacuum and these threads disappeared. Still not sure how it comes to twice a minute per cluster. There are 5 databases, and as far as I know, a client connection to one of them, not doing anything, while this was happening. -- Bryan Henderson San Jose, California -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general