Jim C. Nasby escribió: > There *is* reason to allow setting the naptime smaller, though (or at > least there was; perhaps Alvero's recent changes negate this need): > clusters that have a large number of databases. I've worked with folks > who are in a hosted environment and give each customer their own > database; it's not hard to get a couple hundred databases that way. > Setting the naptime higher than a second in such an environment would > mean it could be hours before a database is checked for vacuuming.
Yes, the code in HEAD is different -- each database will be considered separately. So the huge database taking all day to vacuum will not stop the tiny databases from being vacuumed in a timely manner. And the very huge table in that database will not stop the other tables in the database from being vacuumed either. There can be more than one worker in a single database. The limit is autovacuum_max_workers. -- Alvaro Herrera http://www.CommandPrompt.com/ The PostgreSQL Company - Command Prompt, Inc. ---------------------------(end of broadcast)--------------------------- TIP 1: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
