Michael Paesold wrote:
Matthew T. O'Connor schrieb:
Do we need a configurable autovacuum naptime at all? I know I put it
in the original contrib autovacuum because I had no idea what knobs
might be needed. I can't see a good reason to ever have a naptime
longer than the default 60 seconds, but I suppose one might want a
smaller naptime for a very active system?
A PostgreSQL database on my laptop for testing. It should use as little
resources as possible while being idle. That would be a scenario for
naptime greater than 60 seconds, wouldn't it?
Perhaps, but that isn't the use case PostgresSQL is being designed for.
If that is what you really need, then you should probably disable
autovacuum. Also a very long naptime means that autovacuum will still
wake up at random times and to do the work. At least with short
naptime, it will do the work shortly after you updated your tables.
---------------------------(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
