Re: Automatic free space map filling
| От | Christopher Browne |
|---|---|
| Тема | Re: Automatic free space map filling |
| Дата | |
| Msg-id | 871wxiq5s4.fsf@wolfe.cbbrowne.com обсуждение исходный текст |
| Ответ на | Re: Automatic free space map filling ("Zeugswetter Andreas DCP SD" <ZeugswetterA@spardat.at>) |
| Список | pgsql-hackers |
Centuries ago, Nostradamus foresaw when ZeugswetterA@spardat.at ("Zeugswetter Andreas DCP SD") would write:
>> > But what about index clearing? When do you scan each index?
>>
>> At the end of each iteration (or earlier, depending on
>> maintenance_work_mem). So for each iteration you would need
>> to scan the indexes.
>>
>> Maybe we could make maintenance_work_mem be the deciding
>> factor; after scanning the indexes, do the release/reacquire
>> locks cycle.
>
> But you could do the indexes first and remember how far you can
> vacuum the heap later.
But the indexes _can't_ be done first; you _first_ need to know which
tuples are dead, which requires looking at the table itself.
--
select 'cbbrowne' || '@' || 'gmail.com';
http://linuxdatabases.info/info/languages.html
Pound for pound, the amoeba is the most vicious animal on earth.
В списке pgsql-hackers по дате отправления: