Re: read only transactions

Поиск
Список
Период
Сортировка
От Kevin Grittner
Тема Re: read only transactions
Дата
Msg-id 4CB4697502000025000368A4@gw.wicourts.gov
обсуждение исходный текст
Ответ на read only transactions  (Jon Nelson <jnelson+pgsql@jamponi.net>)
Список pgsql-performance
Jon Nelson <jnelson+pgsql@jamponi.net> wrote:

> Are there any performance implications (benefits) to executing
> queries in a transaction where
> SET TRANSACTION READ ONLY;
> has been executed?

I don't think it allows much optimization in any current release.

It wouldn't be a bad idea to use it where appropriate, though, as
future releases might do something with it.  If you include this on
the BEGIN statement, that will save a round trip.

-Kevin

В списке pgsql-performance по дате отправления:

Предыдущее
От: Tom Lane
Дата:
Сообщение: Re: Slow count(*) again...
Следующее
От: Tom Lane
Дата:
Сообщение: Re: read only transactions