Richard Yen <richyen@xxxxxxxxxxxxxx> writes: > My concern is that--as in the original post--there were moments where 129 WAL files were generated in one minute. Is it plausible that this autovacuum could be responsible for this? That's not a particularly surprising WAL creation rate for a busy database. I wouldn't expect autovacuum to cause it by itself, but that's true only because autovacuum processing is typically throttled by autovacuum_vacuum_cost_delay. Perhaps you had that set to zero? regards, tom lane -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance