On Mon, Apr 21, 2008 at 8:20 PM, Tom Lane <[EMAIL PROTECTED]> wrote: > > No, the reason you don't see that is that plain VACUUM doesn't move > tuples around. >
I know. But plain VACUUM can free up dead space which can be used for subsequent updates/inserts and that can cause reordering. For example: Case 1. Insert 100 records --- goes into block 1 .. 10 Delete 100 records Insert 100 more records --- goes into 11 .. 20 Case 2. Insert 100 records --- goes into block 1 .. 10 Delete 100 records *Autovacuum triggers* Insert 100 more records -- goes into block 1 .. 10 Thanks, Pavan -- Pavan Deolasee EnterpriseDB http://www.enterprisedb.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
