Hint: When turning configuration for autovacuum to minimal settings they are recognized by the autovacuum process started from postmaster. The setting "autovacuum = off" - which I tried to put also into other areas of the conf file (to avoid that it is maybe not parsed corretly) - is not recognized. I also checked pg_settings and autovacuum is "off" - I also tried it with "false" - no change. The autovacuum process is always started some seconds after postmaster is started. I can see in the pg_stat_activity that autovacuum is doing some VACUUM on some of this tables. Any hint what I can try to disable autovacuum? ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match