Hi Kevin, Thanks for the clarification. I have planned to schedule Lazy Vacuum (, not FULL Vacuum) using auto-vacuum daemon. Another query: I do not want to run Analyze. However, auto-vacuum runs both both VACUUM and ANALYZE. I do not see any option to disable running ANALYZE during auto-vacuum. Is there any way to achive this? Pl clarify. Regards, Narasimha Murthy Cell +91 95814 98895, +91-94940 62794 | 040-2347 2025 (O) | x2025 (O) -----Original Message----- From: Kevin Grittner [mailto:Kevin.Grittner@xxxxxxxxxxxx] Sent: Friday, May 14, 2010 7:10 PM To: Narasimha Murthy-VRFX87 Cc: pgsql-admin@xxxxxxxxxxxxxx Subject: Re: Clarification required: autovacuum and VACUUM command mode "Narasimha Murthy-VRFX87" <VRFX87@xxxxxxxxxxxx> wrote: > Guillaume Lelarge <guillaume@xxxxxxxxxxxx> wrote: >> Le 14/05/2010 14:52, Narasimha Murthy-VRFX87 a écrit : >>> VACUUM command works either in plain mode (if we do not specify >>> FULL) or in FULL mode. When autovacuum is enabled, what mode does it >>> run the VACUUM command (in plain mode or in FULL mode)? >> >> In plain mode. > How do I check this? Please clarify. http://www.postgresql.org/docs/8.2/interactive/routine-vacuuming.html#VACUUM-FOR-SPACE-RECOVERY Since VACUUM FULL is not recommended for routine use, it would hardly make sense to use it for autovacuum. If you want to confirm, try selecting from a table while autovacuum is vacuuming it -- since VACUUM FULL locks the table against all other uses, the ability to select proves it's not VACUUM FULL. By the way, I hope you're not considering scheduling regular VACUUM FULL runs against your database. You would wind up regretting that. If you don't believe that, I recommend that you reread the above-cited section until you're convinced. -Kevin -- Sent via pgsql-admin mailing list (pgsql-admin@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
