Re: Table bloat in 8.3

On Thu, Nov 13, 2008 at 1:09 PM, David Wilson <david.t.wilson@gmail.com> wrote:
> On Thu, Nov 13, 2008 at 2:03 PM,  <pgsql-general@ian.org> wrote:
>> I have several tables that when I run VACUUM FULL on, they are under 200k,
>> but after a day of records getting added they grow to 10 to 20 megabytes.
>> They get new inserts and a small number of deletes and updates.
>>
>> seq_scan         | 32325
>> seq_tup_read     | 39428832
>> idx_scan         | 6590219
>> idx_tup_fetch    | 7299318
>> n_tup_ins        | 2879
>> n_tup_upd        | 6829984
>> n_tup_del        | 39
>> n_tup_hot_upd    | 420634
>> n_live_tup       | 2815
>> n_dead_tup       | 0
>
> Can you define "small number of deletes and updates"? The stats above
> would disagree with "small". Remember that every update creates a new,
> updated version of the row, which is where the increase is coming
> from.

And don't forget to look into failed inserts.  Those too create dead tuples.