Re: Autovacuum on by default?

Alvaro Herrera wrote:
> Alvaro Herrera wrote:
>> Matthew T. O'Connor wrote:
>>> Bruce Momjian wrote:
>>>> Matthew T. O'Connor wrote:
>>>>
>>>>> Any chance we can make this change before release? I think it's
>>>>> very important to be able to look through the logs and *know*
>>>>> that you tables are getting vacuumed or not.
>>>>>
>>>>
>>>> Agreed. I just IM'ed Alvaro and he says pg_stat_activity should
>>>> now show exactly what autovacuum is doing (and if it doesn't,
>>>> let's fix it). I think that is the best solution to the monitoring
>>>> problem, rather than throwing lines in the server logs.
>>>
>>> I'm not sure I agree with this. I can use the pg_stat_activity
>>> table to see if autovacuum is doing something right now, but what I
>>> want to be able to do is look through my logs and see that
>>> table_foo hasn't been vacuumed since last week, or that table_bar
>>> has been vacuumed 7 times today. Can I do that just with the stat
>>> system alone?
>>
>> Actually Larry just reminded us that you can use pg_stat_all_tables
>> to see that information. However I'm testing it and it doesn't seem
>> to work for all tables ... strange. I'll have a look.
>
> Nevermind -- it's just that if you vacuum a table which you haven't
> touched (insert, update, delete) since the last stats reset, then the
> vacuum info isn't recorded because we refuse to create the pgstat
> entry for the table.

Do I need to write a Doc patch for that? It seemed consistent with other
functions of the
same class when I did the date patch.

--
Larry Rosenman http://www.lerctr.org/~ler
Phone: +1 512-248-2683 E-Mail: ler(at)lerctr(dot)org
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