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about the performance of autovacuum and vacuumdb?

From: "ivan(dot)hou" <ivan(dot)hou(at)msa(dot)hinet(dot)net>
To: pgsql-admin(at)postgresql(dot)org
Subject: about the performance of autovacuum and vacuumdb?
Date: 2007-12-20 06:50:47
Message-ID: 14431704.post@talk.nabble.com (view raw or flat)
Thread:
Lists: pgsql-admin
i try to compare two methods of garbage-collect.(Postgresql Ver:8.1.3) 

1. enable autovacuum without using vacuumdb -f mydb in crontab. 
2. using crontab to vacuumdb in every 10 min (autovacuum disable) 


the method 2 got more free space than method 1. 


the disk size of database still  increased in method 1. 
so, what's the advantage of autovacuum?

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