Re: Synchronization levels in SR
От | Boszormenyi Zoltan |
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Тема | Re: Synchronization levels in SR |
Дата | |
Msg-id | 4C876AD9.1080000@cybertec.at обсуждение исходный текст |
Ответ на | Re: Synchronization levels in SR (Fujii Masao <masao.fujii@gmail.com>) |
Ответы |
Re: Synchronization levels in SR
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Список | pgsql-hackers |
Fujii Masao írta: > On Wed, Sep 8, 2010 at 7:04 PM, Boszormenyi Zoltan <zb@cybertec.at> wrote: > >> Then there is no use to implement individual sync/async >> replicated transactions, period. An async replicated transaction >> that waits for a sync replicated transaction because of locks >> will become implicitely sync. It just waits for another transactions' >> sync ack. >> > > Hmm.. it's the same with async transaction (i.e., synchronous_commit = false) > and sync one (synchronous_commit = true). Async transaction cannot take the > lock held by sync one until the sync has flushed the WAL. > You are right. -- ---------------------------------- Zoltán Böszörményi Cybertec Schönig & Schönig GmbH Gröhrmühlgasse 26 A-2700 Wiener Neustadt, Austria Web: http://www.postgresql-support.de http://www.postgresql.at/
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